31242404324420 has 24 divisors (see below), whose sum is σ = 65610099828504. Its totient is φ = 12496761587456.

The previous prime is 31242404324401. The next prime is 31242404324431. The reversal of 31242404324420 is 2442340424213.

It can be written as a sum of positive squares in 4 ways, for example, as 6085378524736 + 25157025799684 = 2466856^2 + 5015678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11225657 + ... + 13729536.

It is an arithmetic number, because the mean of its divisors is an integer number (2733754159521).

Almost surely, 2^{31242404324420} is an apocalyptic number.

It is an amenable number.

31242404324420 is an abundant number, since it is smaller than the sum of its proper divisors (34367695504084).

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

31242404324420 is a wasteful number, since it uses less digits than its factorization.

31242404324420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25017799 (or 25017797 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 31242404324420 its reverse (2442340424213), we get a palindrome (33684744748633).

The spelling of 31242404324420 in words is "thirty-one trillion, two hundred forty-two billion, four hundred four million, three hundred twenty-four thousand, four hundred twenty".