215240770 has 16 divisors (see below), whose sum is σ = 388700928. Its totient is φ = 85814640.

The previous prime is 215240747. The next prime is 215240801. The reversal of 215240770 is 77042512.

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, 31986 + ... + 38125.

It is an arithmetic number, because the mean of its divisors is an integer number (24293808).

Almost surely, 2^215240770 is an apocalyptic number.

215240770 is a deficient number, since it is larger than the sum of its proper divisors (173460158).

215240770 is a wasteful number, since it uses less digits than its factorization.

215240770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70425.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 215240770 is about 14671.0861901906. The cubic root of 215240770 is about 599.2961839871.

The spelling of 215240770 in words is "two hundred fifteen million, two hundred forty thousand, seven hundred seventy".