216145830 has 16 divisors (see below), whose sum is σ = 518750064. Its totient is φ = 57638880.

The previous prime is 216145799. The next prime is 216145847. The reversal of 216145830 is 38541612.

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: 7204861 = 216145830 / (2 + 1 + 6 + 1 + 4 + 5 + 8 + 3 + 0).

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 7 ways as a sum of consecutive naturals, for example, 3602401 + ... + 3602460.

It is an arithmetic number, because the mean of its divisors is an integer number (32421879).

Almost surely, 2^216145830 is an apocalyptic number.

216145830 is an abundant number, since it is smaller than the sum of its proper divisors (302604234).

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

216145830 is a wasteful number, since it uses less digits than its factorization.

216145830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7204871.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 216145830 is about 14701.8988569504. The cubic root of 216145830 is about 600.1349974017.

The spelling of 216145830 in words is "two hundred sixteen million, one hundred forty-five thousand, eight hundred thirty".