31245983398 has 32 divisors (see below), whose sum is σ = 56395261440. Its totient is φ = 12683744640.

The previous prime is 31245983381. The next prime is 31245983449. The reversal of 31245983398 is 89338954213.

It is a super-2 number, since 2×31245983398² (a number of 22 digits) contains 22 as substring.

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, 1808983 + ... + 1826173.

It is an arithmetic number, because the mean of its divisors is an integer number (1762351920).

Almost surely, 2^31245983398 is an apocalyptic number.

31245983398 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

31245983398 is a deficient number, since it is larger than the sum of its proper divisors (25149278042).

31245983398 is a wasteful number, since it uses less digits than its factorization.

31245983398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24052.

The product of its digits is 5598720, while the sum is 55.

The spelling of 31245983398 in words is "thirty-one billion, two hundred forty-five million, nine hundred eighty-three thousand, three hundred ninety-eight".