215320653 has 16 divisors (see below), whose sum is σ = 319704000. Its totient is φ = 143227440.

The previous prime is 215320631. The next prime is 215320663. The reversal of 215320653 is 356023512.

215320653 is a `hidden beast` number, since 2 + 1 + 5 + 3 + 2 + 0 + 653 = 666.

It is not a de Polignac number, because 215320653 - 2¹⁷ = 215189581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215320663) 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 15 ways as a sum of consecutive naturals, for example, 3798 + ... + 21096.

It is an arithmetic number, because the mean of its divisors is an integer number (19981500).

Almost surely, 2^215320653 is an apocalyptic number.

It is an amenable number.

215320653 is a deficient number, since it is larger than the sum of its proper divisors (104383347).

215320653 is a wasteful number, since it uses less digits than its factorization.

215320653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17769 (or 17763 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 215320653 is about 14673.8084013660. The cubic root of 215320653 is about 599.3703143912.

The spelling of 215320653 in words is "two hundred fifteen million, three hundred twenty thousand, six hundred fifty-three".