2157392531 has 24 divisors (see below), whose sum is σ = 2673714960. Its totient is φ = 1729631232.

The previous prime is 2157392527. The next prime is 2157392537. The reversal of 2157392531 is 1352937512.

It is a happy number.

It is not a de Polignac number, because 2157392531 - 2² = 2157392527 is a prime.

It is a super-2 number, since 2×2157392531² = 9308685065629171922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2157392537) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 127835 + ... + 143723.

It is an arithmetic number, because the mean of its divisors is an integer number (111404790).

Almost surely, 2^2157392531 is an apocalyptic number.

2157392531 is a deficient number, since it is larger than the sum of its proper divisors (516322429).

2157392531 is a wasteful number, since it uses less digits than its factorization.

2157392531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16083 (or 16076 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 2157392531 is about 46447.7397835460. The cubic root of 2157392531 is about 1292.1404544226.

The spelling of 2157392531 in words is "two billion, one hundred fifty-seven million, three hundred ninety-two thousand, five hundred thirty-one".