216901830 has 16 divisors (see below), whose sum is σ = 520564464. Its totient is φ = 57840480.

The previous prime is 216901813. The next prime is 216901837. The reversal of 216901830 is 38109612.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7230061 = 216901830 / (2 + 1 + 6 + 9 + 0 + 1 + 8 + 3 + 0).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216901837) 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, 3615001 + ... + 3615060.

It is an arithmetic number, because the mean of its divisors is an integer number (32535279).

Almost surely, 2^216901830 is an apocalyptic number.

216901830 is an abundant number, since it is smaller than the sum of its proper divisors (303662634).

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

216901830 is a wasteful number, since it uses less digits than its factorization.

216901830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7230071.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 216901830 is about 14727.5873787936. The cubic root of 216901830 is about 600.8338683469.

The spelling of 216901830 in words is "two hundred sixteen million, nine hundred one thousand, eight hundred thirty".