31841521138 has 24 divisors (see below), whose sum is σ = 55567987632. Its totient is φ = 13644454824.

The previous prime is 31841521121. The next prime is 31841521273. The reversal of 31841521138 is 83112514813.

It is a junction number, because it is equal to n+sod(n) for n = 31841521097 and 31841521106.

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, 850645 + ... + 887287.

It is an arithmetic number, because the mean of its divisors is an integer number (2315332818).

Almost surely, 2^31841521138 is an apocalyptic number.

31841521138 is a deficient number, since it is larger than the sum of its proper divisors (23726466494).

31841521138 is a wasteful number, since it uses less digits than its factorization.

31841521138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45526 (or 45519 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The spelling of 31841521138 in words is "thirty-one billion, eight hundred forty-one million, five hundred twenty-one thousand, one hundred thirty-eight".