216280452 has 24 divisors (see below), whose sum is σ = 505060416. Its totient is φ = 72035488.

The previous prime is 216280423. The next prime is 216280517. The reversal of 216280452 is 254082612.

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, 9913 + ... + 23039.

It is an arithmetic number, because the mean of its divisors is an integer number (21044184).

Almost surely, 2^216280452 is an apocalyptic number.

It is an amenable number.

216280452 is an abundant number, since it is smaller than the sum of its proper divisors (288779964).

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

216280452 is a wasteful number, since it uses less digits than its factorization.

216280452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14507 (or 14505 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 216280452 is about 14706.4765324669. The cubic root of 216280452 is about 600.2595654712.

The spelling of 216280452 in words is "two hundred sixteen million, two hundred eighty thousand, four hundred fifty-two".