216309054 has 32 divisors (see below), whose sum is σ = 493305120. Its totient is φ = 62641152.

The previous prime is 216309029. The next prime is 216309073. The reversal of 216309054 is 450903612.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80239 + ... + 82890.

It is an arithmetic number, because the mean of its divisors is an integer number (15415785).

Almost surely, 2^216309054 is an apocalyptic number.

216309054 is an abundant number, since it is smaller than the sum of its proper divisors (276996066).

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

216309054 is a wasteful number, since it uses less digits than its factorization.

216309054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163164.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 216309054 is about 14707.4489290291. The cubic root of 216309054 is about 600.2860247392.

The spelling of 216309054 in words is "two hundred sixteen million, three hundred nine thousand, fifty-four".