31031144000 has 56 divisors (see below), whose sum is σ = 76848647928. Its totient is φ = 12412454400.

The previous prime is 31031143981. The next prime is 31031144009. The reversal of 31031144000 is 44113013.

It can be written as a sum of positive squares in 4 ways, for example, as 3278249536 + 27752894464 = 57256^2 + 166592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31031144000.

It is not an unprimeable number, because it can be changed into a prime (31031144009) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1931447 + ... + 1947446.

Almost surely, 2^31031144000 is an apocalyptic number.

It is an amenable number.

31031144000 is an abundant number, since it is smaller than the sum of its proper divisors (45817503928).

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

31031144000 is an equidigital number, since it uses as much as digits as its factorization.

31031144000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878920 (or 3878900 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31031144000 its reverse (44113013), we get a palindrome (31075257013).

The spelling of 31031144000 in words is "thirty-one billion, thirty-one million, one hundred forty-four thousand".