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23731113 = 371130053
BaseRepresentation
bin101101010000…
…1101110101001
31122122122222010
41122201232221
522033343423
62204350133
7405465630
oct132415651
948578863
1023731113
111243959a
127b45349
134bbb7a3
14321a517
15213b693
hex16a1ba9

23731113 has 8 divisors (see below), whose sum is σ = 36161728. Its totient is φ = 13560624.

The previous prime is 23731073. The next prime is 23731129. The reversal of 23731113 is 31113732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23731113 - 28 = 23730857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1130053 = 23731113 / (2 + 3 + 7 + 3 + 1 + 1 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23731113.

It is not an unprimeable number, because it can be changed into a prime (23731163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565006 + ... + 565047.

It is an arithmetic number, because the mean of its divisors is an integer number (4520216).

Almost surely, 223731113 is an apocalyptic number.

It is an amenable number.

23731113 is a deficient number, since it is larger than the sum of its proper divisors (12430615).

23731113 is a wasteful number, since it uses less digits than its factorization.

23731113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130063.

The product of its digits is 378, while the sum is 21.

The square root of 23731113 is about 4871.4590216895. The cubic root of 23731113 is about 287.3686376566.

Adding to 23731113 its reverse (31113732), we get a palindrome (54844845).

It can be divided in two parts, 2373 and 1113, that added together give a triangular number (3486 = T83).

The spelling of 23731113 in words is "twenty-three million, seven hundred thirty-one thousand, one hundred thirteen".

Divisors: 1 3 7 21 1130053 3390159 7910371 23731113