216514320 has 80 divisors (see below), whose sum is σ = 732220992. Its totient is φ = 52487680.

The previous prime is 216514313. The next prime is 216514321. The reversal of 216514320 is 23415612.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (216514321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38367 + ... + 43646.

Almost surely, 2^216514320 is an apocalyptic number.

216514320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216514320 is an abundant number, since it is smaller than the sum of its proper divisors (515706672).

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

216514320 is a wasteful number, since it uses less digits than its factorization.

216514320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82040 (or 82034 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 216514320 is about 14714.4255749248. The cubic root of 216514320 is about 600.4758447421.

Adding to 216514320 its reverse (23415612), we get a palindrome (239929932).

The spelling of 216514320 in words is "two hundred sixteen million, five hundred fourteen thousand, three hundred twenty".