31011231000 has 64 divisors (see below), whose sum is σ = 96755050080. Its totient is φ = 8269660800.

The previous prime is 31011230953. The next prime is 31011231019. The reversal of 31011231000 is 13211013.

It is a super-2 number, since 2×31011231000² (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 congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5165539 + ... + 5171538.

Almost surely, 2^31011231000 is an apocalyptic number.

31011231000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31011231000 is an abundant number, since it is smaller than the sum of its proper divisors (65743819080).

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

31011231000 is a wasteful number, since it uses less digits than its factorization.

31011231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337101 (or 10337087 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31011231000 its reverse (13211013), we get a palindrome (31024442013).

The spelling of 31011231000 in words is "thirty-one billion, eleven million, two hundred thirty-one thousand".