816255851 has 4 divisors (see below), whose sum is σ = 827437512. Its totient is φ = 805074192.

The previous prime is 816255829. The next prime is 816255859. The reversal of 816255851 is 158552618.

816255851 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 816255851 - 2¹⁰ = 816254827 is a prime.

It is a super-2 number, since 2×816255851² = 1332547228583468402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816255799 and 816255808.

It is not an unprimeable number, because it can be changed into a prime (816255859) 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, 5590721 + ... + 5590866.

It is an arithmetic number, because the mean of its divisors is an integer number (206859378).

Almost surely, 2^816255851 is an apocalyptic number.

816255851 is a deficient number, since it is larger than the sum of its proper divisors (11181661).

816255851 is a wasteful number, since it uses less digits than its factorization.

816255851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11181660.

The product of its digits is 96000, while the sum is 41.

The square root of 816255851 is about 28570.1916514398. The cubic root of 816255851 is about 934.5634004963.

The spelling of 816255851 in words is "eight hundred sixteen million, two hundred fifty-five thousand, eight hundred fifty-one".