215798142 has 32 divisors (see below), whose sum is σ = 494376192. Its totient is φ = 61516224.

The previous prime is 215798137. The next prime is 215798173. The reversal of 215798142 is 241897512.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 215798142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13573 + ... + 24815.

It is an arithmetic number, because the mean of its divisors is an integer number (15449256).

Almost surely, 2^215798142 is an apocalyptic number.

215798142 is an abundant number, since it is smaller than the sum of its proper divisors (278578050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215798142 is a wasteful number, since it uses less digits than its factorization.

215798142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712.

The product of its digits is 40320, while the sum is 39.

The square root of 215798142 is about 14690.0695028989. The cubic root of 215798142 is about 599.8130361914.

The spelling of 215798142 in words is "two hundred fifteen million, seven hundred ninety-eight thousand, one hundred forty-two".