215530533 has 12 divisors (see below), whose sum is σ = 311577760. Its totient is φ = 143568936.

The previous prime is 215530531. The next prime is 215530537. The reversal of 215530533 is 335035512.

215530533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215530533 - 2¹ = 215530531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215530497 and 215530506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215530531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2538 + ... + 20916.

Almost surely, 2^215530533 is an apocalyptic number.

It is an amenable number.

215530533 is a deficient number, since it is larger than the sum of its proper divisors (96047227).

215530533 is a wasteful number, since it uses less digits than its factorization.

215530533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19688 (or 19685 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 215530533 is about 14680.9581771763. The cubic root of 215530533 is about 599.5649930244.

The spelling of 215530533 in words is "two hundred fifteen million, five hundred thirty thousand, five hundred thirty-three".