216512364 has 24 divisors (see below), whose sum is σ = 506849728. Its totient is φ = 71934480.

The previous prime is 216512333. The next prime is 216512369. The reversal of 216512364 is 463215612.

It is not an unprimeable number, because it can be changed into a prime (216512369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25702 + ... + 33069.

Almost surely, 2^216512364 is an apocalyptic number.

It is an amenable number.

216512364 is an abundant number, since it is smaller than the sum of its proper divisors (290337364).

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

216512364 is a wasteful number, since it uses less digits than its factorization.

216512364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59085 (or 59083 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 216512364 is about 14714.3591093870. The cubic root of 216512364 is about 600.4740364948.

Adding to 216512364 its reverse (463215612), we get a palindrome (679727976).

The spelling of 216512364 in words is "two hundred sixteen million, five hundred twelve thousand, three hundred sixty-four".