3161131272 has 80 divisors (see below), whose sum is σ = 9535204140. Its totient is φ = 972653184.

The previous prime is 3161131243. The next prime is 3161131321. The reversal of 3161131272 is 2721311613.

3161131272 is a `hidden beast` number, since 31 + 611 + 3 + 12 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2756880036 + 404251236 = 52506^2 + 20106^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 179203 + ... + 196050.

Almost surely, 2^3161131272 is an apocalyptic number.

It is an amenable number.

3161131272 is an abundant number, since it is smaller than the sum of its proper divisors (6374072868).

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

3161131272 is a wasteful number, since it uses less digits than its factorization.

3161131272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375284 (or 375271 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 3161131272 is about 56223.9386026984. The cubic root of 3161131272 is about 1467.6218774338.

Adding to 3161131272 its reverse (2721311613), we get a palindrome (5882442885).

The spelling of 3161131272 in words is "three billion, one hundred sixty-one million, one hundred thirty-one thousand, two hundred seventy-two".