215233530 has 32 divisors (see below), whose sum is σ = 526310784. Its totient is φ = 56312256.

The previous prime is 215233519. The next prime is 215233553. The reversal of 215233530 is 35332512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 215233530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66094 + ... + 69273.

It is an arithmetic number, because the mean of its divisors is an integer number (16447212).

Almost surely, 2^215233530 is an apocalyptic number.

215233530 is an abundant number, since it is smaller than the sum of its proper divisors (311077254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215233530 is a wasteful number, since it uses less digits than its factorization.

215233530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135430.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 215233530 is about 14670.8394442854. The cubic root of 215233530 is about 599.2894644531.

The spelling of 215233530 in words is "two hundred fifteen million, two hundred thirty-three thousand, five hundred thirty".