2157372634 has 4 divisors (see below), whose sum is σ = 3236058954. Its totient is φ = 1078686316.

The previous prime is 2157372631. The next prime is 2157372661. The reversal of 2157372634 is 4362737512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1998537025 + 158835609 = 44705^2 + 12603^2 .

It is not an unprimeable number, because it can be changed into a prime (2157372631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539343157 + ... + 539343160.

Almost surely, 2^2157372634 is an apocalyptic number.

2157372634 is a deficient number, since it is larger than the sum of its proper divisors (1078686320).

2157372634 is a wasteful number, since it uses less digits than its factorization.

2157372634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078686319.

The product of its digits is 211680, while the sum is 40.

The square root of 2157372634 is about 46447.5255960961. The cubic root of 2157372634 is about 1292.1364820659.

The spelling of 2157372634 in words is "two billion, one hundred fifty-seven million, three hundred seventy-two thousand, six hundred thirty-four".