31013312000 has 160 divisors (see below), whose sum is σ = 84365877024. Its totient is φ = 11277312000.

The previous prime is 31013311999. The next prime is 31013312009. The reversal of 31013312000 is 21331013.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013312009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681974 + ... + 726026.

Almost surely, 2^31013312000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013312000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42182938512).

31013312000 is an abundant number, since it is smaller than the sum of its proper divisors (53352565024).

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

31013312000 is an equidigital number, since it uses as much as digits as its factorization.

31013312000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44097 (or 44071 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31013312000 its reverse (21331013), we get a palindrome (31034643013).

The spelling of 31013312000 in words is "thirty-one billion, thirteen million, three hundred twelve thousand".