31312210211305 has 8 divisors (see below), whose sum is σ = 37590661919232. Its totient is φ = 25039095058608.

The previous prime is 31312210211297. The next prime is 31312210211341. The reversal of 31312210211305 is 50311201221313.

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 31312210211305 - 2³ = 31312210211297 is a prime.

It is a super-2 number, since 2×31312210211305² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31312210211305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334125897 + ... + 1334149366.

It is an arithmetic number, because the mean of its divisors is an integer number (4698832739904).

Almost surely, 2^{31312210211305} is an apocalyptic number.

It is an amenable number.

31312210211305 is a deficient number, since it is larger than the sum of its proper divisors (6278451707927).

31312210211305 is a wasteful number, since it uses less digits than its factorization.

31312210211305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668277615.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 31312210211305 its reverse (50311201221313), we get a palindrome (81623411432618).

The spelling of 31312210211305 in words is "thirty-one trillion, three hundred twelve billion, two hundred ten million, two hundred eleven thousand, three hundred five".