215042830 has 32 divisors (see below), whose sum is σ = 404157600. Its totient is φ = 82276992.

The previous prime is 215042777. The next prime is 215042831. The reversal of 215042830 is 38240512.

It is a junction number, because it is equal to n+sod(n) for n = 215042795 and 215042804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215042831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28209 + ... + 35011.

It is an arithmetic number, because the mean of its divisors is an integer number (12629925).

Almost surely, 2^215042830 is an apocalyptic number.

215042830 is a deficient number, since it is larger than the sum of its proper divisors (189114770).

215042830 is a wasteful number, since it uses less digits than its factorization.

215042830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 215042830 is about 14664.3387167646. The cubic root of 215042830 is about 599.1124191293.

The spelling of 215042830 in words is "two hundred fifteen million, forty-two thousand, eight hundred thirty".