252005205145 has 4 divisors (see below), whose sum is σ = 302406246180. Its totient is φ = 201604164112.

The previous prime is 252005205143. The next prime is 252005205157. The reversal of 252005205145 is 541502500252.

It is a happy number.

252005205145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 60872732176 + 191132472969 = 246724^2 + 437187^2 .

It is a cyclic number.

It is not a de Polignac number, because 252005205145 - 2¹ = 252005205143 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (252005205143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25200520510 + ... + 25200520519.

It is an arithmetic number, because the mean of its divisors is an integer number (75601561545).

Almost surely, 2^252005205145 is an apocalyptic number.

It is an amenable number.

252005205145 is a deficient number, since it is larger than the sum of its proper divisors (50401041035).

252005205145 is an equidigital number, since it uses as much as digits as its factorization.

252005205145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50401041034.

The product of its (nonzero) digits is 20000, while the sum is 31.

Adding to 252005205145 its reverse (541502500252), we get a palindrome (793507705397).

The spelling of 252005205145 in words is "two hundred fifty-two billion, five million, two hundred five thousand, one hundred forty-five".