216320431224 has 32 divisors (see below), whose sum is σ = 543788940240. Its totient is φ = 71708428800.

The previous prime is 216320431133. The next prime is 216320431231. The reversal of 216320431224 is 422134023612.

It is a junction number, because it is equal to n+sod(n) for n = 216320431191 and 216320431200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24894417 + ... + 24903104.

Almost surely, 2^216320431224 is an apocalyptic number.

216320431224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216320431224 is an abundant number, since it is smaller than the sum of its proper divisors (327468509016).

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

216320431224 is a wasteful number, since it uses less digits than its factorization.

216320431224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49797711 (or 49797707 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 216320431224 its reverse (422134023612), we get a palindrome (638454454836).

The spelling of 216320431224 in words is "two hundred sixteen billion, three hundred twenty million, four hundred thirty-one thousand, two hundred twenty-four".