31305253420 has 24 divisors (see below), whose sum is σ = 75132608544. Its totient is φ = 10733229696.

The previous prime is 31305253391. The next prime is 31305253439. The reversal of 31305253420 is 2435250313.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111804337 + ... + 111804616.

It is an arithmetic number, because the mean of its divisors is an integer number (3130525356).

Almost surely, 2^31305253420 is an apocalyptic number.

It is an amenable number.

31305253420 is an abundant number, since it is smaller than the sum of its proper divisors (43827355124).

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

31305253420 is a wasteful number, since it uses less digits than its factorization.

31305253420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223608969 (or 223608967 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 31305253420 in words is "thirty-one billion, three hundred five million, two hundred fifty-three thousand, four hundred twenty".