216431631424 has 112 divisors (see below), whose sum is σ = 472179700800. Its totient is φ = 98057558016.

The previous prime is 216431631401. The next prime is 216431631499. The reversal of 216431631424 is 424136134612.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2613762 + ... + 2695294.

Almost surely, 2^216431631424 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 216431631424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236089850400).

216431631424 is an abundant number, since it is smaller than the sum of its proper divisors (255748069376).

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

216431631424 is a wasteful number, since it uses less digits than its factorization.

216431631424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81660 (or 81650 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The spelling of 216431631424 in words is "two hundred sixteen billion, four hundred thirty-one million, six hundred thirty-one thousand, four hundred twenty-four".