215122045653 has 24 divisors (see below), whose sum is σ = 323347321440. Its totient is φ = 137705228640.

The previous prime is 215122045627. The next prime is 215122045661. The reversal of 215122045653 is 356540221512.

215122045653 is a `hidden beast` number, since 2 + 151 + 2 + 2 + 0 + 456 + 53 = 666.

215122045653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-215122045653 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 (215122044653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4687938 + ... + 4733603.

It is an arithmetic number, because the mean of its divisors is an integer number (13472805060).

Almost surely, 2^215122045653 is an apocalyptic number.

It is an amenable number.

215122045653 is a deficient number, since it is larger than the sum of its proper divisors (108225275787).

215122045653 is a wasteful number, since it uses less digits than its factorization.

215122045653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421649 (or 9421646 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 215122045653 in words is "two hundred fifteen billion, one hundred twenty-two million, forty-five thousand, six hundred fifty-three".