252002020145 has 4 divisors (see below), whose sum is σ = 302402424180. Its totient is φ = 201601616112.

The previous prime is 252002020103. The next prime is 252002020159. The reversal of 252002020145 is 541020200252.

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 157964117809 + 94037902336 = 397447^2 + 306656^2 .

It is a cyclic number.

It is not a de Polignac number, because 252002020145 - 2¹⁴ = 252002003761 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 252002020145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25200202010 + ... + 25200202019.

It is an arithmetic number, because the mean of its divisors is an integer number (75600606045).

Almost surely, 2^252002020145 is an apocalyptic number.

It is an amenable number.

252002020145 is a deficient number, since it is larger than the sum of its proper divisors (50400404035).

252002020145 is an equidigital number, since it uses as much as digits as its factorization.

252002020145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50400404034.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 252002020145 its reverse (541020200252), we get a palindrome (793022220397).

The spelling of 252002020145 in words is "two hundred fifty-two billion, two million, twenty thousand, one hundred forty-five".