856567201 has 4 divisors (see below), whose sum is σ = 978933952. Its totient is φ = 734200452.

The previous prime is 856567189. The next prime is 856567213. The reversal of 856567201 is 102765658.

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, and also an emirpimes, since its reverse is a distinct semiprime: 102765658 = 2 ⋅51382829.

It is an interprime number because it is at equal distance from previous prime (856567189) and next prime (856567213).

It is a cyclic number.

It is not a de Polignac number, because 856567201 - 2²⁷ = 722349473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856567241) 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, 61183365 + ... + 61183378.

It is an arithmetic number, because the mean of its divisors is an integer number (244733488).

Almost surely, 2^856567201 is an apocalyptic number.

It is an amenable number.

856567201 is a deficient number, since it is larger than the sum of its proper divisors (122366751).

856567201 is a wasteful number, since it uses less digits than its factorization.

856567201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122366750.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 856567201 is about 29267.1693369892. The cubic root of 856567201 is about 949.7015502015.

The spelling of 856567201 in words is "eight hundred fifty-six million, five hundred sixty-seven thousand, two hundred one".