216165630 has 16 divisors (see below), whose sum is σ = 518797584. Its totient is φ = 57644160.

The previous prime is 216165613. The next prime is 216165637. The reversal of 216165630 is 36561612.

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: 7205521 = 216165630 / (2 + 1 + 6 + 1 + 6 + 5 + 6 + 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 (216165637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3602731 + ... + 3602790.

It is an arithmetic number, because the mean of its divisors is an integer number (32424849).

Almost surely, 2^216165630 is an apocalyptic number.

216165630 is an abundant number, since it is smaller than the sum of its proper divisors (302631954).

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

216165630 is a wasteful number, since it uses less digits than its factorization.

216165630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205531.

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

The square root of 216165630 is about 14702.5722239342. The cubic root of 216165630 is about 600.1533219284.

The spelling of 216165630 in words is "two hundred sixteen million, one hundred sixty-five thousand, six hundred thirty".