23351157 has 6 divisors (see below), whose sum is σ = 33729462. Its totient is φ = 15567432.

The previous prime is 23351129. The next prime is 23351161. The reversal of 23351157 is 75115332.

It can be written as a sum of positive squares in only one way, i.e., 23126481 + 224676 = 4809^2 + 474^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23351157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23351157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23351117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1297278 + ... + 1297295.

It is an arithmetic number, because the mean of its divisors is an integer number (5621577).

Almost surely, 2^23351157 is an apocalyptic number.

It is an amenable number.

23351157 is a deficient number, since it is larger than the sum of its proper divisors (10378305).

23351157 is a wasteful number, since it uses less digits than its factorization.

23351157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594579 (or 2594576 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 23351157 is about 4832.3034879858. The cubic root of 23351157 is about 285.8267039879.

Adding to 23351157 its reverse (75115332), we get a palindrome (98466489).

The spelling of 23351157 in words is "twenty-three million, three hundred fifty-one thousand, one hundred fifty-seven".