216534430 has 24 divisors (see below), whose sum is σ = 453397608. Its totient is φ = 74240208.

The previous prime is 216534421. The next prime is 216534433. The reversal of 216534430 is 34435612.

216534430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216534433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220464 + ... + 221443.

It is an arithmetic number, because the mean of its divisors is an integer number (18891567).

Almost surely, 2^216534430 is an apocalyptic number.

216534430 is an abundant number, since it is smaller than the sum of its proper divisors (236863178).

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

216534430 is a wasteful number, since it uses less digits than its factorization.

216534430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441928 (or 441921 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 216534430 is about 14715.1089020775. The cubic root of 216534430 is about 600.4944350373.

The spelling of 216534430 in words is "two hundred sixteen million, five hundred thirty-four thousand, four hundred thirty".