252105130549 has 4 divisors (see below), whose sum is σ = 258918782764. Its totient is φ = 245291478336.

The previous prime is 252105130517. The next prime is 252105130561. The reversal of 252105130549 is 945031501252.

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 238747549924 + 13357580625 = 488618^2 + 115575^2 .

It is a cyclic number.

It is not a de Polignac number, because 252105130549 - 2⁵ = 252105130517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 6813652177 = 252105130549 / (2 + 5 + 2 + 1 + 0 + 5 + 1 + 3 + 0 + 5 + 4 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252105130649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406826052 + ... + 3406826125.

It is an arithmetic number, because the mean of its divisors is an integer number (64729695691).

Almost surely, 2^252105130549 is an apocalyptic number.

It is an amenable number.

252105130549 is a deficient number, since it is larger than the sum of its proper divisors (6813652215).

252105130549 is an equidigital number, since it uses as much as digits as its factorization.

252105130549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6813652214.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 252105130549 in words is "two hundred fifty-two billion, one hundred five million, one hundred thirty thousand, five hundred forty-nine".