23516257 has 2 divisors, whose sum is σ = 23516258. Its totient is φ = 23516256.

The previous prime is 23516237. The next prime is 23516261. The reversal of 23516257 is 75261532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14371681 + 9144576 = 3791^2 + 3024^2 .

It is a cyclic number.

It is not a de Polignac number, because 23516257 - 2¹¹ = 23514209 is a prime.

It is not a weakly prime, because it can be changed into another prime (23516237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11758128 + 11758129.

It is an arithmetic number, because the mean of its divisors is an integer number (11758129).

Almost surely, 2^23516257 is an apocalyptic number.

It is an amenable number.

23516257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23516257 is an equidigital number, since it uses as much as digits as its factorization.

23516257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 23516257 is about 4849.3563490426. The cubic root of 23516257 is about 286.4987507395.

Adding to 23516257 its reverse (75261532), we get a palindrome (98777789).

The spelling of 23516257 in words is "twenty-three million, five hundred sixteen thousand, two hundred fifty-seven".