31126972 has 12 divisors (see below), whose sum is σ = 55631520. Its totient is φ = 15232256.

The previous prime is 31126967. The next prime is 31126973. The reversal of 31126972 is 27962113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31126973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82597 + ... + 82972.

It is an arithmetic number, because the mean of its divisors is an integer number (4635960).

Almost surely, 2^31126972 is an apocalyptic number.

It is an amenable number.

31126972 is a deficient number, since it is larger than the sum of its proper divisors (24504548).

31126972 is a wasteful number, since it uses less digits than its factorization.

31126972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165620 (or 165618 counting only the distinct ones).

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

The square root of 31126972 is about 5579.1551331720. The cubic root of 31126972 is about 314.5663706695.

The spelling of 31126972 in words is "thirty-one million, one hundred twenty-six thousand, nine hundred seventy-two".