31790550932721 has 135 divisors (see below), whose sum is σ = 57102286586697. Its totient is φ = 17573938789680.

The previous prime is 31790550932689. The next prime is 31790550932747. The reversal of 31790550932721 is 12723905509713.

It is a happy number.

The square root of 31790550932721 is 5638311.

It is a perfect power (a square), and thus also a powerful number.

31790550932721 is a `hidden beast` number, since 3 + 1 + 7 + 90 + 5 + 509 + 3 + 27 + 21 = 666.

It is not a de Polignac number, because 31790550932721 - 2⁵ = 31790550932689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31790550972721) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 11011619940 + ... + 11011622826.

Almost surely, 2^{31790550932721} is an apocalyptic number.

31790550932721 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31790550932721 is the 5638311-st square number.

31790550932721 is the 2819156-th centered octagonal number.

It is an amenable number.

31790550932721 is a deficient number, since it is larger than the sum of its proper divisors (25311735653976).

31790550932721 is an frugal number, since it uses more digits than its factorization.

31790550932721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5862 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 3572100, while the sum is 54.

The spelling of 31790550932721 in words is "thirty-one trillion, seven hundred ninety billion, five hundred fifty million, nine hundred thirty-two thousand, seven hundred twenty-one".