23315251 has 4 divisors (see below), whose sum is σ = 23634712. Its totient is φ = 22995792.

The previous prime is 23315233. The next prime is 23315267. The reversal of 23315251 is 15251332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23315251 - 2¹¹ = 23313203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23315231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159621 + ... + 159766.

It is an arithmetic number, because the mean of its divisors is an integer number (5908678).

Almost surely, 2^23315251 is an apocalyptic number.

23315251 is a deficient number, since it is larger than the sum of its proper divisors (319461).

23315251 is an equidigital number, since it uses as much as digits as its factorization.

23315251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319460.

The product of its digits is 900, while the sum is 22.

The square root of 23315251 is about 4828.5868533143. The cubic root of 23315251 is about 285.6801279761.

Adding to 23315251 its reverse (15251332), we get a palindrome (38566583).

The spelling of 23315251 in words is "twenty-three million, three hundred fifteen thousand, two hundred fifty-one".