215045242 has 8 divisors (see below), whose sum is σ = 322635456. Its totient is φ = 107500092.

The previous prime is 215045231. The next prime is 215045263. The reversal of 215045242 is 242540512.

215045242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×215045242² = 92488912213677128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5893 + ... + 21559.

It is an arithmetic number, because the mean of its divisors is an integer number (40329432).

Almost surely, 2^215045242 is an apocalyptic number.

215045242 is a deficient number, since it is larger than the sum of its proper divisors (107590214).

215045242 is a wasteful number, since it uses less digits than its factorization.

215045242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22532.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 215045242 is about 14664.4209568602. The cubic root of 215045242 is about 599.1146590764.

Adding to 215045242 its reverse (242540512), we get a palindrome (457585754).

The spelling of 215045242 in words is "two hundred fifteen million, forty-five thousand, two hundred forty-two".