215205503653 has 16 divisors (see below), whose sum is σ = 250614746496. Its totient is φ = 180963357120.

The previous prime is 215205503629. The next prime is 215205503659. The reversal of 215205503653 is 356305502512.

It is a de Polignac number, because none of the positive numbers 2^k-215205503653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215205503659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4745898 + ... + 4791028.

It is an arithmetic number, because the mean of its divisors is an integer number (15663421656).

Almost surely, 2^215205503653 is an apocalyptic number.

It is an amenable number.

215205503653 is a deficient number, since it is larger than the sum of its proper divisors (35409242843).

215205503653 is a wasteful number, since it uses less digits than its factorization.

215205503653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58044.

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 215205503653 in words is "two hundred fifteen billion, two hundred five million, five hundred three thousand, six hundred fifty-three".