31013900 has 36 divisors (see below), whose sum is σ = 67542552. Its totient is φ = 12360960.

The previous prime is 31013861. The next prime is 31013911. The reversal of 31013900 is 931013.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52004 + ... + 52596.

It is an arithmetic number, because the mean of its divisors is an integer number (1876182).

Almost surely, 2^31013900 is an apocalyptic number.

It is an amenable number.

31013900 is an abundant number, since it is smaller than the sum of its proper divisors (36528652).

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

31013900 is a wasteful number, since it uses less digits than its factorization.

31013900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 31013900 is about 5569.0124797849. The cubic root of 31013900 is about 314.1850100417.

Adding to 31013900 its reverse (931013), we get a palindrome (31944913).

It can be divided in two parts, 31013 and 900, that added together give a palindrome (31913).

The spelling of 31013900 in words is "thirty-one million, thirteen thousand, nine hundred".