252857811 has 8 divisors (see below), whose sum is σ = 340932240. Its totient is φ = 166677632.

The previous prime is 252857807. The next prime is 252857827. The reversal of 252857811 is 118758252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252857811 - 2² = 252857807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252857811.

It is not an unprimeable number, because it can be changed into a prime (252857411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473250 + ... + 473783.

It is an arithmetic number, because the mean of its divisors is an integer number (42616530).

Almost surely, 2^252857811 is an apocalyptic number.

252857811 is a deficient number, since it is larger than the sum of its proper divisors (88074429).

252857811 is an equidigital number, since it uses as much as digits as its factorization.

252857811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947125.

The product of its digits is 44800, while the sum is 39.

The square root of 252857811 is about 15901.5034194884. The cubic root of 252857811 is about 632.3518468585.

The spelling of 252857811 in words is "two hundred fifty-two million, eight hundred fifty-seven thousand, eight hundred eleven".