31113323020331 has 16 divisors (see below), whose sum is σ = 33513760419840. Its totient is φ = 28800215067360.

The previous prime is 31113323020303. The next prime is 31113323020333. The reversal of 31113323020331 is 13302032331113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31113323020331 is a prime.

It is a super-2 number, since 2×31113323020331² (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 31113323020331.

It is not an unprimeable number, because it can be changed into a prime (31113323020333) 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, 77423186 + ... + 77824008.

It is an arithmetic number, because the mean of its divisors is an integer number (2094610026240).

Almost surely, 2^{31113323020331} is an apocalyptic number.

31113323020331 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31113323020331 is a deficient number, since it is larger than the sum of its proper divisors (2400437399509).

31113323020331 is a wasteful number, since it uses less digits than its factorization.

31113323020331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509746.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31113323020331 its reverse (13302032331113), we get a palindrome (44415355351444).

The spelling of 31113323020331 in words is "thirty-one trillion, one hundred thirteen billion, three hundred twenty-three million, twenty thousand, three hundred thirty-one".