216264651 has 16 divisors (see below), whose sum is σ = 294255360. Its totient is φ = 141251040.

The previous prime is 216264641. The next prime is 216264683. The reversal of 216264651 is 156462612.

It is not a de Polignac number, because 216264651 - 2⁵ = 216264619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216264641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31605 + ... + 37833.

It is an arithmetic number, because the mean of its divisors is an integer number (18390960).

Almost surely, 2^216264651 is an apocalyptic number.

216264651 is a deficient number, since it is larger than the sum of its proper divisors (77990709).

216264651 is a wasteful number, since it uses less digits than its factorization.

216264651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6466.

The product of its digits is 17280, while the sum is 33.

The square root of 216264651 is about 14705.9393103603. The cubic root of 216264651 is about 600.2449472101.

The spelling of 216264651 in words is "two hundred sixteen million, two hundred sixty-four thousand, six hundred fifty-one".