23451513 has 16 divisors (see below), whose sum is σ = 33094656. Its totient is φ = 14740880.

The previous prime is 23451509. The next prime is 23451563. The reversal of 23451513 is 31515432.

It is a cyclic number.

It is not a de Polignac number, because 23451513 - 2² = 23451509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23451563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2506 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (2068416).

Almost surely, 2^23451513 is an apocalyptic number.

23451513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23451513 is a deficient number, since it is larger than the sum of its proper divisors (9643143).

23451513 is a wasteful number, since it uses less digits than its factorization.

23451513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884.

The product of its digits is 1800, while the sum is 24.

The square root of 23451513 is about 4842.6762229164. The cubic root of 23451513 is about 286.2355835178.

Adding to 23451513 its reverse (31515432), we get a palindrome (54966945).

The spelling of 23451513 in words is "twenty-three million, four hundred fifty-one thousand, five hundred thirteen".