856214557 has 8 divisors (see below), whose sum is σ = 953926272. Its totient is φ = 761815200.

The previous prime is 856214551. The next prime is 856214657. The reversal of 856214557 is 755412658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856214557 - 2¹⁵ = 856181789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856214551) 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 7 ways as a sum of consecutive naturals, for example, 827544 + ... + 828577.

It is an arithmetic number, because the mean of its divisors is an integer number (119240784).

Almost surely, 2^856214557 is an apocalyptic number.

It is an amenable number.

856214557 is a deficient number, since it is larger than the sum of its proper divisors (97711715).

856214557 is a wasteful number, since it uses less digits than its factorization.

856214557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656179.

The product of its digits is 336000, while the sum is 43.

The square root of 856214557 is about 29261.1441505625. The cubic root of 856214557 is about 949.5712033459.

The spelling of 856214557 in words is "eight hundred fifty-six million, two hundred fourteen thousand, five hundred fifty-seven".