31132612 has 48 divisors (see below), whose sum is σ = 65253888. Its totient is φ = 12718080.

The previous prime is 31132601. The next prime is 31132643. The reversal of 31132612 is 21623113.

It is a self number, because there is not a number n which added to its sum of digits gives 31132612.

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 15 ways as a sum of consecutive naturals, for example, 53668 + ... + 54244.

It is an arithmetic number, because the mean of its divisors is an integer number (1359456).

Almost surely, 2^31132612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31132612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32626944).

31132612 is an abundant number, since it is smaller than the sum of its proper divisors (34121276).

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

31132612 is a wasteful number, since it uses less digits than its factorization.

31132612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 674 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 31132612 is about 5579.6605631526. The cubic root of 31132612 is about 314.5853686325.

Adding to 31132612 its reverse (21623113), we get a palindrome (52755725).

It can be divided in two parts, 311 and 32612, that added together give a palindrome (32923).

The spelling of 31132612 in words is "thirty-one million, one hundred thirty-two thousand, six hundred twelve".