856218355 has 8 divisors (see below), whose sum is σ = 1072134432. Its totient is φ = 655193088.

The previous prime is 856218313. The next prime is 856218367. The reversal of 856218355 is 553812658.

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

It is not a de Polignac number, because 856218355 - 2¹¹ = 856216307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3722574 + ... + 3722803.

It is an arithmetic number, because the mean of its divisors is an integer number (134016804).

Almost surely, 2^856218355 is an apocalyptic number.

856218355 is a deficient number, since it is larger than the sum of its proper divisors (215916077).

856218355 is a wasteful number, since it uses less digits than its factorization.

856218355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445405.

The product of its digits is 288000, while the sum is 43.

The square root of 856218355 is about 29261.2090488414. The cubic root of 856218355 is about 949.5726073811.

The spelling of 856218355 in words is "eight hundred fifty-six million, two hundred eighteen thousand, three hundred fifty-five".