215642150 has 24 divisors (see below), whose sum is σ = 402161760. Its totient is φ = 86027360.

The previous prime is 215642143. The next prime is 215642159. The reversal of 215642150 is 51246512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215642159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13907 + ... + 24993.

It is an arithmetic number, because the mean of its divisors is an integer number (16756740).

Almost surely, 2^215642150 is an apocalyptic number.

215642150 is a deficient number, since it is larger than the sum of its proper divisors (186519610).

215642150 is a wasteful number, since it uses less digits than its factorization.

215642150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11488 (or 11483 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 215642150 is about 14684.7591059574. The cubic root of 215642150 is about 599.6684742590.

Adding to 215642150 its reverse (51246512), we get a palindrome (266888662).

The spelling of 215642150 in words is "two hundred fifteen million, six hundred forty-two thousand, one hundred fifty".