2139031972 has 48 divisors (see below), whose sum is σ = 4715157888. Its totient is φ = 824785920.

The previous prime is 2139031957. The next prime is 2139031991. The reversal of 2139031972 is 2791309312.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5923 + ... + 65674.

It is an arithmetic number, because the mean of its divisors is an integer number (98232456).

Almost surely, 2^2139031972 is an apocalyptic number.

2139031972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2139031972 is an abundant number, since it is smaller than the sum of its proper divisors (2576125916).

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

2139031972 is a wasteful number, since it uses less digits than its factorization.

2139031972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71716 (or 71714 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 2139031972 is about 46249.6699663900. The cubic root of 2139031972 is about 1288.4644051763.

The spelling of 2139031972 in words is "two billion, one hundred thirty-nine million, thirty-one thousand, nine hundred seventy-two".