31538475500 has 48 divisors (see below), whose sum is σ = 78720043584. Its totient is φ = 10813190400.

The previous prime is 31538475491. The next prime is 31538475523. The reversal of 31538475500 is 557483513.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4501997 + ... + 4508996.

It is an arithmetic number, because the mean of its divisors is an integer number (1640000908).

Almost surely, 2^31538475500 is an apocalyptic number.

It is an amenable number.

31538475500 is an abundant number, since it is smaller than the sum of its proper divisors (47181568084).

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

31538475500 is a wasteful number, since it uses less digits than its factorization.

31538475500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9011019 (or 9011007 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 31538475500 in words is "thirty-one billion, five hundred thirty-eight million, four hundred seventy-five thousand, five hundred".