31144430044 has 96 divisors (see below), whose sum is σ = 68629447040. Its totient is φ = 12039487488.

The previous prime is 31144430017. The next prime is 31144430063. The reversal of 31144430044 is 44003444113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 31144429994 and 31144430021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2890972 + ... + 2901724.

Almost surely, 2^31144430044 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 31144430044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34314723520).

31144430044 is an abundant number, since it is smaller than the sum of its proper divisors (37485016996).

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

31144430044 is a wasteful number, since it uses less digits than its factorization.

31144430044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10959 (or 10957 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31144430044 its reverse (44003444113), we get a palindrome (75147874157).

The spelling of 31144430044 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty thousand, forty-four".