23313537 has 12 divisors (see below), whose sum is σ = 36265684. Its totient is φ = 14346720.

The previous prime is 23313533. The next prime is 23313539. The reversal of 23313537 is 73531332.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 22127616 = 1089^2 + 4704^2 .

It is not a de Polignac number, because 23313537 - 2² = 23313533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23313537.

It is not an unprimeable number, because it can be changed into a prime (23313533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99514 + ... + 99747.

Almost surely, 2^23313537 is an apocalyptic number.

It is an amenable number.

23313537 is a deficient number, since it is larger than the sum of its proper divisors (12952147).

23313537 is a wasteful number, since it uses less digits than its factorization.

23313537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199280 (or 199277 counting only the distinct ones).

The product of its digits is 5670, while the sum is 27.

The square root of 23313537 is about 4828.4093654122. The cubic root of 23313537 is about 285.6731272974.

Adding to 23313537 its reverse (73531332), we get a palindrome (96844869).

The spelling of 23313537 in words is "twenty-three million, three hundred thirteen thousand, five hundred thirty-seven".