252220205 has 4 divisors (see below), whose sum is σ = 302664252. Its totient is φ = 201776160.

The previous prime is 252220201. The next prime is 252220207. The reversal of 252220205 is 502022252.

It is a happy number.

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 54789604 + 197430601 = 7402^2 + 14051^2 .

It is not a de Polignac number, because 252220205 - 2² = 252220201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252220201) 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, 25222016 + ... + 25222025.

It is an arithmetic number, because the mean of its divisors is an integer number (75666063).

Almost surely, 2^252220205 is an apocalyptic number.

It is an amenable number.

252220205 is a deficient number, since it is larger than the sum of its proper divisors (50444047).

252220205 is an equidigital number, since it uses as much as digits as its factorization.

252220205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50444046.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 252220205 is about 15881.4421574365. The cubic root of 252220205 is about 631.8198868856.

Adding to 252220205 its reverse (502022252), we get a palindrome (754242457).

The spelling of 252220205 in words is "two hundred fifty-two million, two hundred twenty thousand, two hundred five".