31138454200 has 96 divisors (see below), whose sum is σ = 85592512800. Its totient is φ = 10307888640.

The previous prime is 31138454183. The next prime is 31138454203. The reversal of 31138454200 is 245483113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31138454203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 342879 + ... + 424078.

It is an arithmetic number, because the mean of its divisors is an integer number (891588675).

Almost surely, 2^31138454200 is an apocalyptic number.

It is an amenable number.

31138454200 is an abundant number, since it is smaller than the sum of its proper divisors (54454058600).

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

31138454200 is a wasteful number, since it uses less digits than its factorization.

31138454200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767009 (or 767000 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 31138454200 in words is "thirty-one billion, one hundred thirty-eight million, four hundred fifty-four thousand, two hundred".