216572265 has 192 divisors, whose sum is σ = 511633920. Its totient is φ = 84602880.

The previous prime is 216572263. The next prime is 216572281. The reversal of 216572265 is 562275612.

216572265 is a `hidden beast` number, since 21 + 6 + 572 + 2 + 65 = 666.

It is not a de Polignac number, because 216572265 - 2¹ = 216572263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216572263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3550335 + ... + 3550395.

It is an arithmetic number, because the mean of its divisors is an integer number (2664760).

Almost surely, 2^216572265 is an apocalyptic number.

It is an amenable number.

216572265 is an abundant number, since it is smaller than the sum of its proper divisors (295061655).

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

216572265 is a wasteful number, since it uses less digits than its factorization.

216572265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 106 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 216572265 is about 14716.3944293431. The cubic root of 216572265 is about 600.5294077417.

The spelling of 216572265 in words is "two hundred sixteen million, five hundred seventy-two thousand, two hundred sixty-five".