31320113544 has 24 divisors (see below), whose sum is σ = 84825307710. Its totient is φ = 10440037824.

The previous prime is 31320113543. The next prime is 31320113563. The reversal of 31320113544 is 44531102313.

It is a happy number.

31320113544 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 0 + 113 + 544 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20076056100 + 11244057444 = 141690^2 + 106038^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (31320113543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217500717 + ... + 217500860.

Almost surely, 2^31320113544 is an apocalyptic number.

It is an amenable number.

31320113544 is an abundant number, since it is smaller than the sum of its proper divisors (53505194166).

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

31320113544 is a wasteful number, since it uses less digits than its factorization.

31320113544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435001589 (or 435001582 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 31320113544 its reverse (44531102313), we get a palindrome (75851215857).

The spelling of 31320113544 in words is "thirty-one billion, three hundred twenty million, one hundred thirteen thousand, five hundred forty-four".