31340005240 has 64 divisors (see below), whose sum is σ = 78592615200. Its totient is φ = 11177607168.

The previous prime is 31340005171. The next prime is 31340005247. The reversal of 31340005240 is 4250004313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340005247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1199929 + ... + 1225768.

Almost surely, 2^31340005240 is an apocalyptic number.

It is an amenable number.

31340005240 is an abundant number, since it is smaller than the sum of its proper divisors (47252609960).

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

31340005240 is a wasteful number, since it uses less digits than its factorization.

31340005240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425744 (or 2425740 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 31340005240 its reverse (4250004313), we get a palindrome (35590009553).

The spelling of 31340005240 in words is "thirty-one billion, three hundred forty million, five thousand, two hundred forty".