2157970432 has 22 divisors (see below), whose sum is σ = 4313835518. Its totient is φ = 1078984704.

The previous prime is 2157970421. The next prime is 2157970459. The reversal of 2157970432 is 2340797512.

It can be written as a sum of positive squares in only one way, i.e., 1268499456 + 889470976 = 35616^2 + 29824^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052673 + ... + 1054720.

Almost surely, 2^2157970432 is an apocalyptic number.

It is an amenable number.

2157970432 is a deficient number, since it is larger than the sum of its proper divisors (2155865086).

2157970432 is an equidigital number, since it uses as much as digits as its factorization.

2157970432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107413 (or 2107395 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 2157970432 is about 46453.9603478541. The cubic root of 2157970432 is about 1292.2558193959.

The spelling of 2157970432 in words is "two billion, one hundred fifty-seven million, nine hundred seventy thousand, four hundred thirty-two".