31144430000 has 100 divisors (see below), whose sum is σ = 75722517288. Its totient is φ = 12405120000.

The previous prime is 31144429951. The next prime is 31144430017. The reversal of 31144430000 is 3444113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2403539 + ... + 2416461.

Almost surely, 2^31144430000 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 31144430000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37861258644).

31144430000 is an abundant number, since it is smaller than the sum of its proper divisors (44578087288).

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

31144430000 is a wasteful number, since it uses less digits than its factorization.

31144430000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13192 (or 13171 counting only the distinct ones).

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

Adding to 31144430000 its reverse (3444113), we get a palindrome (31147874113).

The spelling of 31144430000 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty thousand".