252217285 has 4 divisors (see below), whose sum is σ = 302660748. Its totient is φ = 201773824.

The previous prime is 252217213. The next prime is 252217289. The reversal of 252217285 is 582712252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124233316 + 127983969 = 11146^2 + 11313^2 .

It is a cyclic number.

It is not a de Polignac number, because 252217285 - 2¹¹ = 252215237 is a prime.

It is a super-3 number, since 3×252217285³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252217285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252217289) 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 3 ways as a sum of consecutive naturals, for example, 25221724 + ... + 25221733.

It is an arithmetic number, because the mean of its divisors is an integer number (75665187).

Almost surely, 2^252217285 is an apocalyptic number.

It is an amenable number.

252217285 is a deficient number, since it is larger than the sum of its proper divisors (50443463).

252217285 is an equidigital number, since it uses as much as digits as its factorization.

252217285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50443462.

The product of its digits is 22400, while the sum is 34.

The square root of 252217285 is about 15881.3502259726. The cubic root of 252217285 is about 631.8174486443.

The spelling of 252217285 in words is "two hundred fifty-two million, two hundred seventeen thousand, two hundred eighty-five".