209915152 has 20 divisors (see below), whose sum is σ = 413379916. Its totient is φ = 103236480.

The previous prime is 209915141. The next prime is 209915183. The reversal of 209915152 is 251519902.

It can be written as a sum of positive squares in 2 ways, for example, as 33131536 + 176783616 = 5756^2 + 13296^2 .

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, 106563 + ... + 108514.

Almost surely, 2^209915152 is an apocalyptic number.

It is an amenable number.

209915152 is a deficient number, since it is larger than the sum of its proper divisors (203464764).

209915152 is a wasteful number, since it uses less digits than its factorization.

209915152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215146 (or 215140 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 209915152 is about 14488.4489162919. The cubic root of 209915152 is about 594.3121321290.

The spelling of 209915152 in words is "two hundred nine million, nine hundred fifteen thousand, one hundred fifty-two".