857551225 has 12 divisors (see below), whose sum is σ = 1119330640. Its totient is φ = 649933200.

The previous prime is 857551207. The next prime is 857551229. The reversal of 857551225 is 522155758.

It is not a de Polignac number, because 857551225 - 2¹³ = 857543033 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (857551229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 902211 + ... + 903160.

Almost surely, 2^857551225 is an apocalyptic number.

It is an amenable number.

857551225 is a deficient number, since it is larger than the sum of its proper divisors (261779415).

857551225 is a wasteful number, since it uses less digits than its factorization.

857551225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805400 (or 1805395 counting only the distinct ones).

The product of its digits is 140000, while the sum is 40.

The square root of 857551225 is about 29283.9755668523. The cubic root of 857551225 is about 950.0650832604.

The spelling of 857551225 in words is "eight hundred fifty-seven million, five hundred fifty-one thousand, two hundred twenty-five".