861100227 has 40 divisors (see below), whose sum is σ = 1391722640. Its totient is φ = 527446080.

The previous prime is 861100181. The next prime is 861100271. The reversal of 861100227 is 722001168.

861100227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861100227 - 2⁸ = 861099971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861100227.

It is not an unprimeable number, because it can be changed into a prime (861100127) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 239352 + ... + 242922.

It is an arithmetic number, because the mean of its divisors is an integer number (34793066).

Almost surely, 2^861100227 is an apocalyptic number.

861100227 is a deficient number, since it is larger than the sum of its proper divisors (530622413).

861100227 is a wasteful number, since it uses less digits than its factorization.

861100227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 861100227 is about 29344.5093160543. The cubic root of 861100227 is about 951.3739038644.

The spelling of 861100227 in words is "eight hundred sixty-one million, one hundred thousand, two hundred twenty-seven".