23215770 has 24 divisors (see below), whose sum is σ = 60361236. Its totient is φ = 6190848.

The previous prime is 23215723. The next prime is 23215781. The reversal of 23215770 is 7751232.

It can be written as a sum of positive squares in 2 ways, for example, as 21150801 + 2064969 = 4599^2 + 1437^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 128887 + ... + 129066.

Almost surely, 2^23215770 is an apocalyptic number.

23215770 is an abundant number, since it is smaller than the sum of its proper divisors (37145466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23215770 is a wasteful number, since it uses less digits than its factorization.

23215770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257966 (or 257963 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 23215770 is about 4818.2745874431. The cubic root of 23215770 is about 285.2732374942.

The spelling of 23215770 in words is "twenty-three million, two hundred fifteen thousand, seven hundred seventy".