209413252 has 12 divisors (see below), whose sum is σ = 382406976. Its totient is φ = 100154120.

The previous prime is 209413249. The next prime is 209413261. The reversal of 209413252 is 252314902.

It is a super-2 number, since 2×209413252² = 87707820226431008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 209413252.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1138024 + ... + 1138207.

It is an arithmetic number, because the mean of its divisors is an integer number (31867248).

Almost surely, 2^209413252 is an apocalyptic number.

It is an amenable number.

209413252 is a deficient number, since it is larger than the sum of its proper divisors (172993724).

209413252 is a wasteful number, since it uses less digits than its factorization.

209413252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276258 (or 2276256 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 209413252 is about 14471.1178559225. The cubic root of 209413252 is about 593.8380940831.

The spelling of 209413252 in words is "two hundred nine million, four hundred thirteen thousand, two hundred fifty-two".