23157210 has 64 divisors (see below), whose sum is σ = 57988224. Its totient is φ = 5913600.

The previous prime is 23157193. The next prime is 23157223. The reversal of 23157210 is 1275132.

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 31 ways as a sum of consecutive naturals, for example, 82270 + ... + 82550.

It is an arithmetic number, because the mean of its divisors is an integer number (906066).

Almost surely, 2^23157210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23157210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28994112).

23157210 is an abundant number, since it is smaller than the sum of its proper divisors (34831014).

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

23157210 is a wasteful number, since it uses less digits than its factorization.

23157210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 23157210 is about 4812.1938863683. The cubic root of 23157210 is about 285.0331755779.

The spelling of 23157210 in words is "twenty-three million, one hundred fifty-seven thousand, two hundred ten".