816214855 has 4 divisors (see below), whose sum is σ = 979457832. Its totient is φ = 652971880.

The previous prime is 816214849. The next prime is 816214859. The reversal of 816214855 is 558412618.

It is a happy number.

816214855 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 not a de Polignac number, because 816214855 - 2¹¹ = 816212807 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816214859) 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, 81621481 + ... + 81621490.

It is an arithmetic number, because the mean of its divisors is an integer number (244864458).

Almost surely, 2^816214855 is an apocalyptic number.

816214855 is a deficient number, since it is larger than the sum of its proper divisors (163242977).

816214855 is a wasteful number, since it uses less digits than its factorization.

816214855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163242976.

The product of its digits is 76800, while the sum is 40.

The square root of 816214855 is about 28569.4741813706. The cubic root of 816214855 is about 934.5477542572.

The spelling of 816214855 in words is "eight hundred sixteen million, two hundred fourteen thousand, eight hundred fifty-five".