31113272 has 8 divisors (see below), whose sum is σ = 58337400. Its totient is φ = 15556632.

The previous prime is 31113253. The next prime is 31113283. The reversal of 31113272 is 27231113.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 1944572 + ... + 1944587.

It is an arithmetic number, because the mean of its divisors is an integer number (7292175).

Almost surely, 2^31113272 is an apocalyptic number.

It is an amenable number.

31113272 is a deficient number, since it is larger than the sum of its proper divisors (27224128).

31113272 is a wasteful number, since it uses less digits than its factorization.

31113272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889165 (or 3889161 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 31113272 is about 5577.9272135803. The cubic root of 31113272 is about 314.5202135757.

Adding to 31113272 its reverse (27231113), we get a palindrome (58344385).

The spelling of 31113272 in words is "thirty-one million, one hundred thirteen thousand, two hundred seventy-two".