31551505500138 has 32 divisors (see below), whose sum is σ = 68055434889792. Its totient is φ = 9694106092800.

The previous prime is 31551505500101. The next prime is 31551505500223. The reversal of 31551505500138 is 83100550515513.

It is a self number, because there is not a number n which added to its sum of digits gives 31551505500138.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292642543 + ... + 292750338.

It is an arithmetic number, because the mean of its divisors is an integer number (2126732340306).

Almost surely, 2^{31551505500138} is an apocalyptic number.

31551505500138 is an abundant number, since it is smaller than the sum of its proper divisors (36503929389654).

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

31551505500138 is a wasteful number, since it uses less digits than its factorization.

31551505500138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585393590.

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 31551505500138 in words is "thirty-one trillion, five hundred fifty-one billion, five hundred five million, five hundred thousand, one hundred thirty-eight".