216306051 has 32 divisors (see below), whose sum is σ = 330973440. Its totient is φ = 124550784.

The previous prime is 216306049. The next prime is 216306067. The reversal of 216306051 is 150603612.

It is not a de Polignac number, because 216306051 - 2¹ = 216306049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216306451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59745 + ... + 63261.

It is an arithmetic number, because the mean of its divisors is an integer number (10342920).

Almost surely, 2^216306051 is an apocalyptic number.

216306051 is a deficient number, since it is larger than the sum of its proper divisors (114667389).

216306051 is a wasteful number, since it uses less digits than its factorization.

216306051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 216306051 is about 14707.3468375503. The cubic root of 216306051 is about 600.2832468199.

Adding to 216306051 its reverse (150603612), we get a palindrome (366909663).

The spelling of 216306051 in words is "two hundred sixteen million, three hundred six thousand, fifty-one".