23915257 has 2 divisors, whose sum is σ = 23915258. Its totient is φ = 23915256.

The previous prime is 23915251. The next prime is 23915293. The reversal of 23915257 is 75251932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19501056 + 4414201 = 4416^2 + 2101^2 .

It is a cyclic number.

It is not a de Polignac number, because 23915257 - 2²³ = 15526649 is a prime.

It is not a weakly prime, because it can be changed into another prime (23915251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11957628 + 11957629.

It is an arithmetic number, because the mean of its divisors is an integer number (11957629).

Almost surely, 2^23915257 is an apocalyptic number.

It is an amenable number.

23915257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23915257 is an equidigital number, since it uses as much as digits as its factorization.

23915257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 23915257 is about 4890.3227909822. The cubic root of 23915257 is about 288.1100121446.

The spelling of 23915257 in words is "twenty-three million, nine hundred fifteen thousand, two hundred fifty-seven".