31534530444 has 96 divisors (see below), whose sum is σ = 82873190400. Its totient is φ = 10368622080.

The previous prime is 31534530407. The next prime is 31534530457. The reversal of 31534530444 is 44403543513.

31534530444 is a `hidden beast` number, since 3 + 1 + 5 + 345 + 304 + 4 + 4 = 666.

It is a super-2 number, since 2×31534530444² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31534530399 and 31534530408.

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, 3253197 + ... + 3262875.

It is an arithmetic number, because the mean of its divisors is an integer number (863262400).

Almost surely, 2^31534530444 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 31534530444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41436595200).

31534530444 is an abundant number, since it is smaller than the sum of its proper divisors (51338659956).

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

31534530444 is a wasteful number, since it uses less digits than its factorization.

31534530444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100 (or 10092 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The spelling of 31534530444 in words is "thirty-one billion, five hundred thirty-four million, five hundred thirty thousand, four hundred forty-four".