31143044000 has 96 divisors (see below), whose sum is σ = 77221544400. Its totient is φ = 12342758400.

The previous prime is 31143043969. The next prime is 31143044003. The reversal of 31143044000 is 44034113.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 50069776 + 31092974224 = 7076^2 + 176332^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31143044003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400286 + ... + 471714.

Almost surely, 2^31143044000 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 31143044000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38610772200).

31143044000 is an abundant number, since it is smaller than the sum of its proper divisors (46078500400).

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

31143044000 is a wasteful number, since it uses less digits than its factorization.

31143044000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71563 (or 71545 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31143044000 its reverse (44034113), we get a palindrome (31187078113).

The spelling of 31143044000 in words is "thirty-one billion, one hundred forty-three million, forty-four thousand".