31431024334420 has 48 divisors (see below), whose sum is σ = 67622783646096. Its totient is φ = 12264359552000.

The previous prime is 31431024334387. The next prime is 31431024334441. The reversal of 31431024334420 is 2443342013413.

It can be written as a sum of positive squares in 8 ways, for example, as 2407872199824 + 29023152134596 = 1551732^2 + 5387314^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4975050 + ... + 9360190.

It is an arithmetic number, because the mean of its divisors is an integer number (1408807992627).

Almost surely, 2^{31431024334420} is an apocalyptic number.

It is an amenable number.

31431024334420 is an abundant number, since it is smaller than the sum of its proper divisors (36191759311676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31431024334420 is a wasteful number, since it uses less digits than its factorization.

31431024334420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393932 (or 4393930 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 31431024334420 its reverse (2443342013413), we get a palindrome (33874366347833).

The spelling of 31431024334420 in words is "thirty-one trillion, four hundred thirty-one billion, twenty-four million, three hundred thirty-four thousand, four hundred twenty".