209355052 has 24 divisors (see below), whose sum is σ = 369729360. Its totient is φ = 103723200.

The previous prime is 209355049. The next prime is 209355071. The reversal of 209355052 is 250553902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298302 + ... + 299002.

It is an arithmetic number, because the mean of its divisors is an integer number (15405390).

Almost surely, 2^209355052 is an apocalyptic number.

It is an amenable number.

209355052 is a deficient number, since it is larger than the sum of its proper divisors (160374308).

209355052 is a wasteful number, since it uses less digits than its factorization.

209355052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 209355052 is about 14469.1068141748. The cubic root of 209355052 is about 593.7830759487.

The spelling of 209355052 in words is "two hundred nine million, three hundred fifty-five thousand, fifty-two".