220031312031 has 20 divisors (see below), whose sum is σ = 328720095000. Its totient is φ = 146673552816.

The previous prime is 220031311991. The next prime is 220031312041. The reversal of 220031312031 is 130213130022.

220031312031 is a `hidden beast` number, since 2 + 200 + 313 + 120 + 31 = 666.

It is not a de Polignac number, because 220031312031 - 2²³ = 220022923423 is a prime.

It is a super-2 number, since 2×220031312031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220031311995 and 220031312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220031312041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 762820 + ... + 1010918.

It is an arithmetic number, because the mean of its divisors is an integer number (16436004750).

Almost surely, 2^220031312031 is an apocalyptic number.

220031312031 is a deficient number, since it is larger than the sum of its proper divisors (108688782969).

220031312031 is a wasteful number, since it uses less digits than its factorization.

220031312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259060 (or 259051 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 220031312031 its reverse (130213130022), we get a palindrome (350244442053).

The spelling of 220031312031 in words is "two hundred twenty billion, thirty-one million, three hundred twelve thousand, thirty-one".