31011132 has 12 divisors (see below), whose sum is σ = 72359336. Its totient is φ = 10337040.

The previous prime is 31011131. The next prime is 31011161. The reversal of 31011132 is 23111013.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 2584261 = 31011132 / (3 + 1 + 0 + 1 + 1 + 1 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011131) 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, 1292119 + ... + 1292142.

Almost surely, 2^31011132 is an apocalyptic number.

It is an amenable number.

31011132 is an abundant number, since it is smaller than the sum of its proper divisors (41348204).

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

31011132 is a wasteful number, since it uses less digits than its factorization.

31011132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584268 (or 2584266 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 31011132 is about 5568.7639562115. The cubic root of 31011132 is about 314.1756627277.

Adding to 31011132 its reverse (23111013), we get a palindrome (54122145).

The spelling of 31011132 in words is "thirty-one million, eleven thousand, one hundred thirty-two".