31323220023403 has 16 divisors (see below), whose sum is σ = 39062281349376. Its totient is φ = 24401481985440.

The previous prime is 31323220023367. The next prime is 31323220023449. The reversal of 31323220023403 is 30432002232313.

It is not a de Polignac number, because 31323220023403 - 2²⁹ = 31322683152491 is a prime.

It is a super-2 number, since 2×31323220023403² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323220020403) 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, 51545376 + ... + 52149517.

It is an arithmetic number, because the mean of its divisors is an integer number (2441392584336).

Almost surely, 2^{31323220023403} is an apocalyptic number.

31323220023403 is a deficient number, since it is larger than the sum of its proper divisors (7739061325973).

31323220023403 is a wasteful number, since it uses less digits than its factorization.

31323220023403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103698834.

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 31323220023403 its reverse (30432002232313), we get a palindrome (61755222255716).

The spelling of 31323220023403 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred twenty million, twenty-three thousand, four hundred three".