31020132 has 48 divisors (see below), whose sum is σ = 85038912. Its totient is φ = 8676480.

The previous prime is 31020127. The next prime is 31020133. The reversal of 31020132 is 23102013.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (31020133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7323 + ... + 10754.

It is an arithmetic number, because the mean of its divisors is an integer number (1771644).

Almost surely, 2^31020132 is an apocalyptic number.

It is an amenable number.

31020132 is an abundant number, since it is smaller than the sum of its proper divisors (54018780).

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

31020132 is a wasteful number, since it uses less digits than its factorization.

31020132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18108 (or 18106 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31020132 is about 5569.5719763730. The cubic root of 31020132 is about 314.2060529703.

Adding to 31020132 its reverse (23102013), we get a palindrome (54122145).

It can be divided in two parts, 3102013 and 2, that multiplied together give a palindrome (6204026).

The spelling of 31020132 in words is "thirty-one million, twenty thousand, one hundred thirty-two".