215142890 has 32 divisors (see below), whose sum is σ = 409821120. Its totient is φ = 81091584.

The previous prime is 215142881. The next prime is 215142911. The reversal of 215142890 is 98241512.

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, 33737 + ... + 39603.

It is an arithmetic number, because the mean of its divisors is an integer number (12806910).

Almost surely, 2^215142890 is an apocalyptic number.

215142890 is a deficient number, since it is larger than the sum of its proper divisors (194678230).

215142890 is a wasteful number, since it uses less digits than its factorization.

215142890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6086.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 215142890 is about 14667.7499978695. The cubic root of 215142890 is about 599.2053275872.

The spelling of 215142890 in words is "two hundred fifteen million, one hundred forty-two thousand, eight hundred ninety".