216089631 has 6 divisors (see below), whose sum is σ = 312129480. Its totient is φ = 144059748.

The previous prime is 216089593. The next prime is 216089647. The reversal of 216089631 is 136980612.

216089631 is a `hidden beast` number, since 2 + 16 + 0 + 8 + 9 + 631 = 666.

It is not a de Polignac number, because 216089631 - 2¹¹ = 216087583 is a prime.

It is a super-2 number, since 2×216089631² = 93389457251432322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216089651) 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 5 ways as a sum of consecutive naturals, for example, 12004971 + ... + 12004988.

It is an arithmetic number, because the mean of its divisors is an integer number (52021580).

Almost surely, 2^216089631 is an apocalyptic number.

216089631 is a deficient number, since it is larger than the sum of its proper divisors (96039849).

216089631 is a wasteful number, since it uses less digits than its factorization.

216089631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24009965 (or 24009962 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 216089631 is about 14699.9874489742. The cubic root of 216089631 is about 600.0829801900.

The spelling of 216089631 in words is "two hundred sixteen million, eighty-nine thousand, six hundred thirty-one".