31200340040 has 64 divisors (see below), whose sum is σ = 78242371200. Its totient is φ = 11127794688.

The previous prime is 31200340019. The next prime is 31200340043. The reversal of 31200340040 is 4004300213.

It is a super-2 number, since 2×31200340040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (31200340043) 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 15 ways as a sum of consecutive naturals, for example, 1194524 + ... + 1220363.

It is an arithmetic number, because the mean of its divisors is an integer number (1222537050).

Almost surely, 2^31200340040 is an apocalyptic number.

It is an amenable number.

31200340040 is an abundant number, since it is smaller than the sum of its proper divisors (47042031160).

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

31200340040 is a wasteful number, since it uses less digits than its factorization.

31200340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414934 (or 2414930 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 31200340040 its reverse (4004300213), we get a palindrome (35204640253).

The spelling of 31200340040 in words is "thirty-one billion, two hundred million, three hundred forty thousand, forty".