215473653 has 24 divisors (see below), whose sum is σ = 322533120. Its totient is φ = 138473280.

The previous prime is 215473651. The next prime is 215473663. The reversal of 215473653 is 356374512.

It is not a de Polignac number, because 215473653 - 2¹ = 215473651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215473651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77593 + ... + 80321.

It is an arithmetic number, because the mean of its divisors is an integer number (13438880).

Almost surely, 2^215473653 is an apocalyptic number.

It is an amenable number.

215473653 is a deficient number, since it is larger than the sum of its proper divisors (107059467).

215473653 is a wasteful number, since it uses less digits than its factorization.

215473653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049 (or 3046 counting only the distinct ones).

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

The square root of 215473653 is about 14679.0208460919. The cubic root of 215473653 is about 599.5122452663.

It can be divided in two parts, 21547 and 3653, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 215473653 in words is "two hundred fifteen million, four hundred seventy-three thousand, six hundred fifty-three".