31226872 has 16 divisors (see below), whose sum is σ = 59070240. Its totient is φ = 15474816.

The previous prime is 31226869. The next prime is 31226873. The reversal of 31226872 is 27862213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31226873) 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, 16368 + ... + 18175.

It is an arithmetic number, because the mean of its divisors is an integer number (3691890).

Almost surely, 2^31226872 is an apocalyptic number.

It is an amenable number.

31226872 is a deficient number, since it is larger than the sum of its proper divisors (27843368).

31226872 is a wasteful number, since it uses less digits than its factorization.

31226872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34662 (or 34658 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 31226872 is about 5588.1009296540. The cubic root of 31226872 is about 314.9025380853.

The spelling of 31226872 in words is "thirty-one million, two hundred twenty-six thousand, eight hundred seventy-two".