215042930 has 16 divisors (see below), whose sum is σ = 387483480. Its totient is φ = 85926912.

The previous prime is 215042899. The next prime is 215042953. The reversal of 215042930 is 39240512.

215042930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 151856329 + 63186601 = 12323^2 + 7949^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215042930.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815 + ... + 20754.

Almost surely, 2^215042930 is an apocalyptic number.

215042930 is a deficient number, since it is larger than the sum of its proper divisors (172440550).

215042930 is a wasteful number, since it uses less digits than its factorization.

215042930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22573.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 215042930 is about 14664.3421263963. The cubic root of 215042930 is about 599.1125119964.

The spelling of 215042930 in words is "two hundred fifteen million, forty-two thousand, nine hundred thirty".