31242135320 has 64 divisors (see below), whose sum is σ = 76703824800. Its totient is φ = 11358023680.

The previous prime is 31242135313. The next prime is 31242135349. The reversal of 31242135320 is 2353124213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31242135320.

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, 3017192 + ... + 3027528.

Almost surely, 2^31242135320 is an apocalyptic number.

It is an amenable number.

31242135320 is an abundant number, since it is smaller than the sum of its proper divisors (45461689480).

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

31242135320 is a wasteful number, since it uses less digits than its factorization.

31242135320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17228 (or 17224 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 31242135320 its reverse (2353124213), we get a palindrome (33595259533).

The spelling of 31242135320 in words is "thirty-one billion, two hundred forty-two million, one hundred thirty-five thousand, three hundred twenty".