857087217331 has 4 divisors (see below), whose sum is σ = 857167397064. Its totient is φ = 857007037600.

The previous prime is 857087217293. The next prime is 857087217391. The reversal of 857087217331 is 133712780758.

857087217331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 857087217331 - 2³⁹ = 307331403443 is a prime.

It is a super-2 number, since 2×857087217331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857087217391) 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, 40073830 + ... + 40095211.

It is an arithmetic number, because the mean of its divisors is an integer number (214291849266).

Almost surely, 2^857087217331 is an apocalyptic number.

857087217331 is a deficient number, since it is larger than the sum of its proper divisors (80179733).

857087217331 is a wasteful number, since it uses less digits than its factorization.

857087217331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80179732.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 857087217331 in words is "eight hundred fifty-seven billion, eighty-seven million, two hundred seventeen thousand, three hundred thirty-one".