31311210220323 has 16 divisors (see below), whose sum is σ = 47523734090496. Its totient is φ = 18151426214240.

The previous prime is 31311210220319. The next prime is 31311210220333. The reversal of 31311210220323 is 32302201211313.

It is not a de Polignac number, because 31311210220323 - 2² = 31311210220319 is a prime.

It is a super-2 number, since 2×31311210220323² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31311210220293 and 31311210220302.

It is not an unprimeable number, because it can be changed into a prime (31311210220313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20626619940 + ... + 20626621457.

It is an arithmetic number, because the mean of its divisors is an integer number (2970233380656).

Almost surely, 2^{31311210220323} is an apocalyptic number.

31311210220323 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31311210220323 is a deficient number, since it is larger than the sum of its proper divisors (16212523870173).

31311210220323 is a wasteful number, since it uses less digits than its factorization.

31311210220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41253241434.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31311210220323 its reverse (32302201211313), we get a palindrome (63613411431636).

The spelling of 31311210220323 in words is "thirty-one trillion, three hundred eleven billion, two hundred ten million, two hundred twenty thousand, three hundred twenty-three".