31272272 has 20 divisors (see below), whose sum is σ = 63225120. Its totient is φ = 14956128.

The previous prime is 31272259. The next prime is 31272277. The reversal of 31272272 is 27227213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31272277) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42122 + ... + 42857.

It is an arithmetic number, because the mean of its divisors is an integer number (3161256).

Almost surely, 2^31272272 is an apocalyptic number.

It is an amenable number.

31272272 is an abundant number, since it is smaller than the sum of its proper divisors (31952848).

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

31272272 is a wasteful number, since it uses less digits than its factorization.

31272272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85010 (or 85004 counting only the distinct ones).

The product of its digits is 2352, while the sum is 26.

The square root of 31272272 is about 5592.1616571769. The cubic root of 31272272 is about 315.0550739347.

Adding to 31272272 its reverse (27227213), we get a palindrome (58499485).

The spelling of 31272272 in words is "thirty-one million, two hundred seventy-two thousand, two hundred seventy-two".