23570257 has 4 divisors (see below), whose sum is σ = 23854320. Its totient is φ = 23286196.

The previous prime is 23570249. The next prime is 23570273. The reversal of 23570257 is 75207532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23570257 - 2³ = 23570249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23570237) 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, 141907 + ... + 142072.

It is an arithmetic number, because the mean of its divisors is an integer number (5963580).

Almost surely, 2^23570257 is an apocalyptic number.

It is an amenable number.

23570257 is a deficient number, since it is larger than the sum of its proper divisors (284063).

23570257 is an equidigital number, since it uses as much as digits as its factorization.

23570257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284062.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 23570257 is about 4854.9209056379. The cubic root of 23570257 is about 286.7178772462.

Adding to 23570257 its reverse (75207532), we get a palindrome (98777789).

The spelling of 23570257 in words is "twenty-three million, five hundred seventy thousand, two hundred fifty-seven".