31431394088 has 32 divisors (see below), whose sum is σ = 60472440000. Its totient is φ = 15306695040.

The previous prime is 31431394067. The next prime is 31431394103. The reversal of 31431394088 is 88049313413.

It is a super-2 number, since 2×31431394088² (a number of 22 digits) contains 22 as substring.

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, 116483 + ... + 276461.

It is an arithmetic number, because the mean of its divisors is an integer number (1889763750).

Almost surely, 2^31431394088 is an apocalyptic number.

It is an amenable number.

31431394088 is a deficient number, since it is larger than the sum of its proper divisors (29041045912).

31431394088 is a wasteful number, since it uses less digits than its factorization.

31431394088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160625 (or 160621 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 31431394088 in words is "thirty-one billion, four hundred thirty-one million, three hundred ninety-four thousand, eighty-eight".