215601242 has 8 divisors (see below), whose sum is σ = 342425556. Its totient is φ = 101459392.

The previous prime is 215601233. The next prime is 215601263. The reversal of 215601242 is 242106512.

It is a happy number.

215601242 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 2 ways, for example, as 209989081 + 5612161 = 14491^2 + 2369^2 .

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

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, 3170573 + ... + 3170640.

Almost surely, 2^215601242 is an apocalyptic number.

215601242 is a deficient number, since it is larger than the sum of its proper divisors (126824314).

215601242 is a wasteful number, since it uses less digits than its factorization.

215601242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6341232.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 215601242 is about 14683.3661671975. The cubic root of 215601242 is about 599.6305521902.

Adding to 215601242 its reverse (242106512), we get a palindrome (457707754).

The spelling of 215601242 in words is "two hundred fifteen million, six hundred one thousand, two hundred forty-two".