31312022221313 has 4 divisors (see below), whose sum is σ = 31360417928640. Its totient is φ = 31263626513988.

The previous prime is 31312022221289. The next prime is 31312022221367. The reversal of 31312022221313 is 31312222021313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31312022221313 - 2¹⁴ = 31312022204929 is a prime.

It is a super-3 number, since 3×31312022221313³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312022221213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24197852693 + ... + 24197853986.

It is an arithmetic number, because the mean of its divisors is an integer number (7840104482160).

Almost surely, 2^{31312022221313} is an apocalyptic number.

It is an amenable number.

31312022221313 is a deficient number, since it is larger than the sum of its proper divisors (48395707327).

31312022221313 is an equidigital number, since it uses as much as digits as its factorization.

31312022221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48395707326.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31312022221313 its reverse (31312222021313), we get a palindrome (62624244242626).

The spelling of 31312022221313 in words is "thirty-one trillion, three hundred twelve billion, twenty-two million, two hundred twenty-one thousand, three hundred thirteen".