23615257 has 2 divisors, whose sum is σ = 23615258. Its totient is φ = 23615256.

The previous prime is 23615237. The next prime is 23615297. The reversal of 23615257 is 75251632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 5433561 = 4264^2 + 2331^2 .

It is a cyclic number.

It is not a de Polignac number, because 23615257 - 2²³ = 15226649 is a prime.

It is not a weakly prime, because it can be changed into another prime (23615237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11807628 + 11807629.

It is an arithmetic number, because the mean of its divisors is an integer number (11807629).

Almost surely, 2^23615257 is an apocalyptic number.

It is an amenable number.

23615257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23615257 is an equidigital number, since it uses as much as digits as its factorization.

23615257 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 23615257 is about 4859.5531687594. The cubic root of 23615257 is about 286.9002271488.

Adding to 23615257 its reverse (75251632), we get a palindrome (98866889).

The spelling of 23615257 in words is "twenty-three million, six hundred fifteen thousand, two hundred fifty-seven".