31131321432322 has 16 divisors (see below), whose sum is σ = 46842368117760. Its totient is φ = 15517265251648.

The previous prime is 31131321432307. The next prime is 31131321432329. The reversal of 31131321432322 is 22323412313113.

It is a super-2 number, since 2×31131321432322² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31131321432329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15694618 + ... + 17566549.

It is an arithmetic number, because the mean of its divisors is an integer number (2927648007360).

Almost surely, 2^{31131321432322} is an apocalyptic number.

31131321432322 is a deficient number, since it is larger than the sum of its proper divisors (15711046685438).

31131321432322 is a wasteful number, since it uses less digits than its factorization.

31131321432322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33262625.

The product of its digits is 15552, while the sum is 31.

Adding to 31131321432322 its reverse (22323412313113), we get a palindrome (53454733745435).

It can be divided in two parts, 3113132 and 1432322, that added together give a palindrome (4545454).

The spelling of 31131321432322 in words is "thirty-one trillion, one hundred thirty-one billion, three hundred twenty-one million, four hundred thirty-two thousand, three hundred twenty-two".