3129131272 has 32 divisors (see below), whose sum is σ = 5919427800. Its totient is φ = 1550674944.

The previous prime is 3129131263. The next prime is 3129131287. The reversal of 3129131272 is 2721319213.

It can be written as a sum of positive squares in 4 ways, for example, as 3017744356 + 111386916 = 54934^2 + 10554^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463054 + ... + 469762.

Almost surely, 2^3129131272 is an apocalyptic number.

It is an amenable number.

3129131272 is a deficient number, since it is larger than the sum of its proper divisors (2790296528).

3129131272 is a wasteful number, since it uses less digits than its factorization.

3129131272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7225 (or 7221 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 3129131272 is about 55938.6384532194. The cubic root of 3129131272 is about 1462.6528474143.

The spelling of 3129131272 in words is "three billion, one hundred twenty-nine million, one hundred thirty-one thousand, two hundred seventy-two".