31431000000 has 196 divisors, whose sum is σ = 103960075544. Its totient is φ = 8380800000.

The previous prime is 31430999989. The next prime is 31431000017. The reversal of 31431000000 is 13413.

It is a super-2 number, since 2×31431000000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31431000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2994762 + ... + 3005238.

Almost surely, 2^31431000000 is an apocalyptic number.

31431000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31431000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51980037772).

31431000000 is an abundant number, since it is smaller than the sum of its proper divisors (72529075544).

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

31431000000 is an frugal number, since it uses more digits than its factorization.

31431000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10522 (or 10487 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31431000000 its reverse (13413), we get a palindrome (31431013413).

The spelling of 31431000000 in words is "thirty-one billion, four hundred thirty-one million", and thus it is an aban number.