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23031141 = 371764513
BaseRepresentation
bin101011111011…
…0110101100101
31121100002210020
41113312311211
521343444031
62141345353
7366522120
oct127666545
947302706
1023031141
1112000701
127868259
134a04cc3
1430b73b7
15204e096
hex15f6d65

23031141 has 16 divisors (see below), whose sum is σ = 37160064. Its totient is φ = 12386304.

The previous prime is 23031121. The next prime is 23031157. The reversal of 23031141 is 14113032.

It is not a de Polignac number, because 23031141 - 29 = 23030629 is a prime.

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 23031141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31900 + ... + 32613.

It is an arithmetic number, because the mean of its divisors is an integer number (2322504).

Almost surely, 223031141 is an apocalyptic number.

23031141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23031141 is a deficient number, since it is larger than the sum of its proper divisors (14128923).

23031141 is a wasteful number, since it uses less digits than its factorization.

23031141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64540.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 23031141 is about 4799.0770987764. The cubic root of 23031141 is about 284.5149891771.

Adding to 23031141 its reverse (14113032), we get a palindrome (37144173).

The spelling of 23031141 in words is "twenty-three million, thirty-one thousand, one hundred forty-one".

Divisors: 1 3 7 17 21 51 119 357 64513 193539 451591 1096721 1354773 3290163 7677047 23031141