31214400040 has 64 divisors (see below), whose sum is σ = 75648196800. Its totient is φ = 11553518592.

The previous prime is 31214400029. The next prime is 31214400079. The reversal of 31214400040 is 4000441213.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 31214399990 and 31214400017.

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, 444897 + ... + 510256.

It is an arithmetic number, because the mean of its divisors is an integer number (1182003075).

Almost surely, 2^31214400040 is an apocalyptic number.

It is an amenable number.

31214400040 is an abundant number, since it is smaller than the sum of its proper divisors (44433796760).

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

31214400040 is a wasteful number, since it uses less digits than its factorization.

31214400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955226 (or 955222 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31214400040 its reverse (4000441213), we get a palindrome (35214841253).

The spelling of 31214400040 in words is "thirty-one billion, two hundred fourteen million, four hundred thousand, forty".