31132423240 has 16 divisors (see below), whose sum is σ = 70047952380. Its totient is φ = 12452969280.

The previous prime is 31132423219. The next prime is 31132423247. The reversal of 31132423240 is 4232423113.

It can be written as a sum of positive squares in 2 ways, for example, as 28929247396 + 2203175844 = 170086^2 + 46938^2 .

It is not an unprimeable number, because it can be changed into a prime (31132423247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389155251 + ... + 389155330.

Almost surely, 2^31132423240 is an apocalyptic number.

It is an amenable number.

31132423240 is an abundant number, since it is smaller than the sum of its proper divisors (38915529140).

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

31132423240 is a wasteful number, since it uses less digits than its factorization.

31132423240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778310592 (or 778310588 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31132423240 its reverse (4232423113), we get a palindrome (35364846353).

The spelling of 31132423240 in words is "thirty-one billion, one hundred thirty-two million, four hundred twenty-three thousand, two hundred forty".