23513971 has 4 divisors (see below), whose sum is σ = 25322752. Its totient is φ = 21705192.

The previous prime is 23513969. The next prime is 23513989. The reversal of 23513971 is 17931532.

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 23513971 - 2¹ = 23513969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23513071) 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, 904371 + ... + 904396.

It is an arithmetic number, because the mean of its divisors is an integer number (6330688).

Almost surely, 2^23513971 is an apocalyptic number.

23513971 is a deficient number, since it is larger than the sum of its proper divisors (1808781).

23513971 is a wasteful number, since it uses less digits than its factorization.

23513971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808780.

The product of its digits is 5670, while the sum is 31.

The square root of 23513971 is about 4849.1206419309. The cubic root of 23513971 is about 286.4894669864.

The spelling of 23513971 in words is "twenty-three million, five hundred thirteen thousand, nine hundred seventy-one".