215673453 has 12 divisors (see below), whose sum is σ = 312681408. Its totient is φ = 143250120.

The previous prime is 215673443. The next prime is 215673467. The reversal of 215673453 is 354376512.

It is not a de Polignac number, because 215673453 - 2⁸ = 215673197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215673443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41775 + ... + 46652.

It is an arithmetic number, because the mean of its divisors is an integer number (26056784).

Almost surely, 2^215673453 is an apocalyptic number.

It is an amenable number.

215673453 is a deficient number, since it is larger than the sum of its proper divisors (97007955).

215673453 is a wasteful number, since it uses less digits than its factorization.

215673453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88704 (or 88701 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 215673453 is about 14685.8249002227. The cubic root of 215673453 is about 599.6974891710.

The spelling of 215673453 in words is "two hundred fifteen million, six hundred seventy-three thousand, four hundred fifty-three".