252857549 has 4 divisors (see below), whose sum is σ = 288980064. Its totient is φ = 216735036.

The previous prime is 252857533. The next prime is 252857551. The reversal of 252857549 is 945758252.

It is a happy number.

252857549 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 252857549 - 2⁴ = 252857533 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 (252857849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18061247 + ... + 18061260.

It is an arithmetic number, because the mean of its divisors is an integer number (72245016).

Almost surely, 2^252857549 is an apocalyptic number.

It is an amenable number.

252857549 is a deficient number, since it is larger than the sum of its proper divisors (36122515).

252857549 is an equidigital number, since it uses as much as digits as its factorization.

252857549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36122514.

The product of its digits is 1008000, while the sum is 47.

The square root of 252857549 is about 15901.4951812715. The cubic root of 252857549 is about 632.3516284535.

The spelling of 252857549 in words is "two hundred fifty-two million, eight hundred fifty-seven thousand, five hundred forty-nine".