31400152 has 32 divisors (see below), whose sum is σ = 70214400. Its totient is φ = 12871584.

The previous prime is 31400143. The next prime is 31400167. The reversal of 31400152 is 25100413.

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 7 ways as a sum of consecutive naturals, for example, 10902 + ... + 13477.

It is an arithmetic number, because the mean of its divisors is an integer number (2194200).

Almost surely, 2^31400152 is an apocalyptic number.

It is an amenable number.

31400152 is an abundant number, since it is smaller than the sum of its proper divisors (38814248).

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

31400152 is a wasteful number, since it uses less digits than its factorization.

31400152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24415 (or 24411 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 31400152 is about 5603.5838532139. The cubic root of 31400152 is about 315.4839357471.

Adding to 31400152 its reverse (25100413), we get a palindrome (56500565).

The spelling of 31400152 in words is "thirty-one million, four hundred thousand, one hundred fifty-two".