216572135 has 16 divisors (see below), whose sum is σ = 280687680. Its totient is φ = 159467520.

The previous prime is 216572131. The next prime is 216572159. The reversal of 216572135 is 531275612.

216572135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216572135 - 2² = 216572131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216572131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18695 + ... + 27975.

It is an arithmetic number, because the mean of its divisors is an integer number (17542980).

Almost surely, 2^216572135 is an apocalyptic number.

216572135 is a deficient number, since it is larger than the sum of its proper divisors (64115545).

216572135 is a wasteful number, since it uses less digits than its factorization.

216572135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9658.

The product of its digits is 12600, while the sum is 32.

The square root of 216572135 is about 14716.3900124997. The cubic root of 216572135 is about 600.5292875834.

The spelling of 216572135 in words is "two hundred sixteen million, five hundred seventy-two thousand, one hundred thirty-five".