216836694 has 24 divisors (see below), whose sum is σ = 470084472. Its totient is φ = 72237120.

The previous prime is 216836689. The next prime is 216836699. The reversal of 216836694 is 496638612.

It is an interprime number because it is at equal distance from previous prime (216836689) and next prime (216836699).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216836699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55774 + ... + 59534.

It is an arithmetic number, because the mean of its divisors is an integer number (19586853).

Almost surely, 2^216836694 is an apocalyptic number.

216836694 is an abundant number, since it is smaller than the sum of its proper divisors (253247778).

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

216836694 is a wasteful number, since it uses less digits than its factorization.

216836694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6972 (or 6969 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 216836694 is about 14725.3758525886. The cubic root of 216836694 is about 600.7737185039.

The spelling of 216836694 in words is "two hundred sixteen million, eight hundred thirty-six thousand, six hundred ninety-four".