31143900 has 36 divisors (see below), whose sum is σ = 90110552. Its totient is φ = 8304960.

The previous prime is 31143877. The next prime is 31143919. The reversal of 31143900 is 934113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51607 + ... + 52206.

Almost surely, 2^31143900 is an apocalyptic number.

31143900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31143900 is an abundant number, since it is smaller than the sum of its proper divisors (58966652).

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

31143900 is a wasteful number, since it uses less digits than its factorization.

31143900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103830 (or 103823 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 31143900 is about 5580.6720025459. The cubic root of 31143900 is about 314.6233846155.

The spelling of 31143900 in words is "thirty-one million, one hundred forty-three thousand, nine hundred".