857322505 has 32 divisors (see below), whose sum is σ = 1174188960. Its totient is φ = 596305920.

The previous prime is 857322491. The next prime is 857322509. The reversal of 857322505 is 505223758.

It can be written as a sum of positive squares in 16 ways, for example, as 395373456 + 461949049 = 19884^2 + 21493^2 .

It is not a de Polignac number, because 857322505 - 2²⁵ = 823768073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857322509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71739 + ... + 82831.

It is an arithmetic number, because the mean of its divisors is an integer number (36693405).

Almost surely, 2^857322505 is an apocalyptic number.

It is an amenable number.

857322505 is a deficient number, since it is larger than the sum of its proper divisors (316866455).

857322505 is a wasteful number, since it uses less digits than its factorization.

857322505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11181.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 857322505 is about 29280.0700989598. The cubic root of 857322505 is about 949.9806108693.

The spelling of 857322505 in words is "eight hundred fifty-seven million, three hundred twenty-two thousand, five hundred five".