2157098631 has 16 divisors (see below), whose sum is σ = 3082297344. Its totient is φ = 1338362784.

The previous prime is 2157098627. The next prime is 2157098689. The reversal of 2157098631 is 1368907512.

It is not a de Polignac number, because 2157098631 - 2² = 2157098627 is a prime.

It is a super-2 number, since 2×2157098631² = 9306149007724148322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157098131) 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 15 ways as a sum of consecutive naturals, for example, 419911 + ... + 425016.

It is an arithmetic number, because the mean of its divisors is an integer number (192643584).

Almost surely, 2^2157098631 is an apocalyptic number.

2157098631 is a deficient number, since it is larger than the sum of its proper divisors (925198713).

2157098631 is a wasteful number, since it uses less digits than its factorization.

2157098631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844990.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 2157098631 is about 46444.5759050505. The cubic root of 2157098631 is about 1292.0817759762.

The spelling of 2157098631 in words is "two billion, one hundred fifty-seven million, ninety-eight thousand, six hundred thirty-one".