31523063212217 has 8 divisors (see below), whose sum is σ = 32557808377224. Its totient is φ = 30504613246848.

The previous prime is 31523063212183. The next prime is 31523063212243. The reversal of 31523063212217 is 71221236032513.

It can be written as a sum of positive squares in 4 ways, for example, as 17109316868281 + 14413746343936 = 4136341^2 + 3796544^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31523063212217 - 2³⁶ = 31454343735481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31523063211217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4073795978 + ... + 4073803715.

It is an arithmetic number, because the mean of its divisors is an integer number (4069726047153).

Almost surely, 2^{31523063212217} is an apocalyptic number.

It is an amenable number.

31523063212217 is a deficient number, since it is larger than the sum of its proper divisors (1034745165007).

31523063212217 is an equidigital number, since it uses as much as digits as its factorization.

31523063212217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8147599819.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 31523063212217 in words is "thirty-one trillion, five hundred twenty-three billion, sixty-three million, two hundred twelve thousand, two hundred seventeen".