216900653 has 4 divisors (see below), whose sum is σ = 218154588. Its totient is φ = 215646720.

The previous prime is 216900613. The next prime is 216900661. The reversal of 216900653 is 356009612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209294089 + 7606564 = 14467^2 + 2758^2 .

It is a cyclic number.

It is not a de Polignac number, because 216900653 - 2⁶ = 216900589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216900613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626708 + ... + 627053.

It is an arithmetic number, because the mean of its divisors is an integer number (54538647).

Almost surely, 2^216900653 is an apocalyptic number.

It is an amenable number.

216900653 is a deficient number, since it is larger than the sum of its proper divisors (1253935).

216900653 is a wasteful number, since it uses less digits than its factorization.

216900653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253934.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 216900653 is about 14727.5474197166. The cubic root of 216900653 is about 600.8327815530.

The spelling of 216900653 in words is "two hundred sixteen million, nine hundred thousand, six hundred fifty-three".