855075217 has 4 divisors (see below), whose sum is σ = 878185396. Its totient is φ = 831965040.

The previous prime is 855075211. The next prime is 855075233. The reversal of 855075217 is 712570558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 681784321 + 173290896 = 26111^2 + 13164^2 .

It is a cyclic number.

It is not a de Polignac number, because 855075217 - 2²³ = 846686609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855075217.

It is not an unprimeable number, because it can be changed into a prime (855075211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11555034 + ... + 11555107.

It is an arithmetic number, because the mean of its divisors is an integer number (219546349).

Almost surely, 2^855075217 is an apocalyptic number.

It is an amenable number.

855075217 is a deficient number, since it is larger than the sum of its proper divisors (23110179).

855075217 is a wasteful number, since it uses less digits than its factorization.

855075217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23110178.

The product of its (nonzero) digits is 98000, while the sum is 40.

The square root of 855075217 is about 29241.6691897026. The cubic root of 855075217 is about 949.1498273880.

The spelling of 855075217 in words is "eight hundred fifty-five million, seventy-five thousand, two hundred seventeen".