215975830 has 48 divisors (see below), whose sum is σ = 453836736. Its totient is φ = 73785600.

The previous prime is 215975827. The next prime is 215975843. The reversal of 215975830 is 38579512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179230 + ... + 180430.

It is an arithmetic number, because the mean of its divisors is an integer number (9454932).

Almost surely, 2^215975830 is an apocalyptic number.

215975830 is an abundant number, since it is smaller than the sum of its proper divisors (237860906).

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

215975830 is a wasteful number, since it uses less digits than its factorization.

215975830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 215975830 is about 14696.1161535965. The cubic root of 215975830 is about 599.9776195356.

The spelling of 215975830 in words is "two hundred fifteen million, nine hundred seventy-five thousand, eight hundred thirty".