252102209 has 8 divisors (see below), whose sum is σ = 255068160. Its totient is φ = 249149376.

The previous prime is 252102187. The next prime is 252102217. The reversal of 252102209 is 902201252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252102209 - 2¹² = 252098113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252102229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38432 + ... + 44510.

It is an arithmetic number, because the mean of its divisors is an integer number (31883520).

Almost surely, 2^252102209 is an apocalyptic number.

It is an amenable number.

252102209 is a deficient number, since it is larger than the sum of its proper divisors (2965951).

252102209 is a wasteful number, since it uses less digits than its factorization.

252102209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 252102209 is about 15877.7268209275. The cubic root of 252102209 is about 631.7213435667.

The spelling of 252102209 in words is "two hundred fifty-two million, one hundred two thousand, two hundred nine".