20221031313 has 48 divisors (see below), whose sum is σ = 33817006080. Its totient is φ = 11404810368.

The previous prime is 20221031273. The next prime is 20221031399. The reversal of 20221031313 is 31313012202.

It is not a de Polignac number, because 20221031313 - 2²¹ = 20218934161 is a prime.

It is a super-2 number, since 2×20221031313² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20221036313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1569783 + ... + 1582611.

It is an arithmetic number, because the mean of its divisors is an integer number (704520960).

Almost surely, 2^20221031313 is an apocalyptic number.

It is an amenable number.

20221031313 is a deficient number, since it is larger than the sum of its proper divisors (13595974767).

20221031313 is a wasteful number, since it uses less digits than its factorization.

20221031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13166 (or 13163 counting only the distinct ones).

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

Adding to 20221031313 its reverse (31313012202), we get a palindrome (51534043515).

The spelling of 20221031313 in words is "twenty billion, two hundred twenty-one million, thirty-one thousand, three hundred thirteen".