2157523512 has 32 divisors (see below), whose sum is σ = 5421200400. Its totient is φ = 715522304.

The previous prime is 2157523507. The next prime is 2157523553. The reversal of 2157523512 is 2153257512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223437 + ... + 232892.

Almost surely, 2^2157523512 is an apocalyptic number.

It is an amenable number.

2157523512 is an abundant number, since it is smaller than the sum of its proper divisors (3263676888).

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

2157523512 is a wasteful number, since it uses less digits than its factorization.

2157523512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456535 (or 456531 counting only the distinct ones).

The product of its digits is 21000, while the sum is 33.

The square root of 2157523512 is about 46449.1497446401. The cubic root of 2157523512 is about 1292.1666036469.

The spelling of 2157523512 in words is "two billion, one hundred fifty-seven million, five hundred twenty-three thousand, five hundred twelve".