31152156 has 48 divisors (see below), whose sum is σ = 83709696. Its totient is φ = 8832384.

The previous prime is 31152133. The next prime is 31152161. The reversal of 31152156 is 65125113.

It is a congruent number.

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, 10155 + ... + 12861.

It is an arithmetic number, because the mean of its divisors is an integer number (1743952).

Almost surely, 2^31152156 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 31152156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41854848).

31152156 is an abundant number, since it is smaller than the sum of its proper divisors (52557540).

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

31152156 is a wasteful number, since it uses less digits than its factorization.

31152156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858 (or 2856 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 31152156 is about 5581.4116493948. The cubic root of 31152156 is about 314.6511835442.

Adding to 31152156 its reverse (65125113), we get a palindrome (96277269).

The spelling of 31152156 in words is "thirty-one million, one hundred fifty-two thousand, one hundred fifty-six".