23215515210 has 48 divisors (see below), whose sum is σ = 60407905896. Its totient is φ = 6185925504.

The previous prime is 23215515179. The next prime is 23215515227. The reversal of 23215515210 is 1251551232.

23215515210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21267263889 + 1948251321 = 145833^2 + 44139^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13932 + ... + 215928.

Almost surely, 2^23215515210 is an apocalyptic number.

23215515210 is an abundant number, since it is smaller than the sum of its proper divisors (37192390686).

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

23215515210 is a wasteful number, since it uses less digits than its factorization.

23215515210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203287 (or 203284 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 23215515210 in words is "twenty-three billion, two hundred fifteen million, five hundred fifteen thousand, two hundred ten".