31530216656334 has 128 divisors (see below), whose sum is σ = 73576981463040. Its totient is φ = 8913647952000.

The previous prime is 31530216656327. The next prime is 31530216656347. The reversal of 31530216656334 is 43365661203513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8737587 + ... + 11807025.

It is an arithmetic number, because the mean of its divisors is an integer number (574820167680).

Almost surely, 2^{31530216656334} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31530216656334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36788490731520).

31530216656334 is an abundant number, since it is smaller than the sum of its proper divisors (42046764806706).

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

31530216656334 is a wasteful number, since it uses less digits than its factorization.

31530216656334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069646.

The product of its (nonzero) digits is 3499200, while the sum is 48.

Adding to 31530216656334 its reverse (43365661203513), we get a palindrome (74895877859847).

The spelling of 31530216656334 in words is "thirty-one trillion, five hundred thirty billion, two hundred sixteen million, six hundred fifty-six thousand, three hundred thirty-four".