31022318285381 has 16 divisors (see below), whose sum is σ = 32245473187440. Its totient is φ = 29809697702400.

The previous prime is 31022318285369. The next prime is 31022318285401. The reversal of 31022318285381 is 18358281322013.

It can be written as a sum of positive squares in 8 ways, for example, as 2075400390625 + 28946917894756 = 1440625^2 + 5380234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31022318285381 is a prime.

It is a super-2 number, since 2×31022318285381² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022318285681) 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, 2937431 + ... + 8406731.

It is an arithmetic number, because the mean of its divisors is an integer number (2015342074215).

Almost surely, 2^{31022318285381} is an apocalyptic number.

It is an amenable number.

31022318285381 is a deficient number, since it is larger than the sum of its proper divisors (1223154902059).

31022318285381 is a wasteful number, since it uses less digits than its factorization.

31022318285381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470264.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 31022318285381 in words is "thirty-one trillion, twenty-two billion, three hundred eighteen million, two hundred eighty-five thousand, three hundred eighty-one".