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23202131 = 149155719
BaseRepresentation
bin101100010000…
…0100101010011
31121122210100012
41120200211103
521414432011
62145145135
7401133461
oct130404523
947583305
1023202131
1112108117
12792b1ab
134a64a94
14311d831
152084a8b
hex1620953

23202131 has 4 divisors (see below), whose sum is σ = 23358000. Its totient is φ = 23046264.

The previous prime is 23202121. The next prime is 23202133. The reversal of 23202131 is 13120232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-23202131 is a prime.

It is a super-2 number, since 2×232021312 = 1076677765882322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23202133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77711 + ... + 78008.

It is an arithmetic number, because the mean of its divisors is an integer number (5839500).

Almost surely, 223202131 is an apocalyptic number.

23202131 is a deficient number, since it is larger than the sum of its proper divisors (155869).

23202131 is a wasteful number, since it uses less digits than its factorization.

23202131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155868.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 23202131 is about 4816.8590388343. The cubic root of 23202131 is about 285.2173616265.

Adding to 23202131 its reverse (13120232), we get a palindrome (36322363).

The spelling of 23202131 in words is "twenty-three million, two hundred two thousand, one hundred thirty-one".

Divisors: 1 149 155719 23202131