216261135 has 24 divisors (see below), whose sum is σ = 394583280. Its totient is φ = 109268352.

The previous prime is 216261127. The next prime is 216261179. The reversal of 216261135 is 531162612.

216261135 is a `hidden beast` number, since 2 + 1 + 626 + 1 + 1 + 35 = 666.

It is not a de Polignac number, because 216261135 - 2³ = 216261127 is a prime.

It is a super-2 number, since 2×216261135² = 93537757022976450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216261099 and 216261108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125614 + ... + 127323.

It is an arithmetic number, because the mean of its divisors is an integer number (16440970).

Almost surely, 2^216261135 is an apocalyptic number.

216261135 is a deficient number, since it is larger than the sum of its proper divisors (178322145).

216261135 is a wasteful number, since it uses less digits than its factorization.

216261135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252967 (or 252964 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 216261135 is about 14705.8197663374. The cubic root of 216261135 is about 600.2416942934.

The spelling of 216261135 in words is "two hundred sixteen million, two hundred sixty-one thousand, one hundred thirty-five".