31132152 has 24 divisors (see below), whose sum is σ = 84316440. Its totient is φ = 10377360.

The previous prime is 31132141. The next prime is 31132159. The reversal of 31132152 is 25123113.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×31132152² = 1938421776302208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216124 + ... + 216267.

It is an arithmetic number, because the mean of its divisors is an integer number (3513185).

Almost surely, 2^31132152 is an apocalyptic number.

It is an amenable number.

31132152 is an abundant number, since it is smaller than the sum of its proper divisors (53184288).

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

31132152 is a wasteful number, since it uses less digits than its factorization.

31132152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432403 (or 432396 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 31132152 is about 5579.6193418548. The cubic root of 31132152 is about 314.5838192391.

Adding to 31132152 its reverse (25123113), we get a palindrome (56255265).

The spelling of 31132152 in words is "thirty-one million, one hundred thirty-two thousand, one hundred fifty-two".