227161836 has 72 divisors (see below), whose sum is σ = 628939584. Its totient is φ = 68559840.

The previous prime is 227161813. The next prime is 227161841. The reversal of 227161836 is 638161722.

227161836 is a `hidden beast` number, since 2 + 2 + 7 + 1 + 618 + 36 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 227161836.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111055 + ... + 113081.

It is an arithmetic number, because the mean of its divisors is an integer number (8735272).

Almost surely, 2^227161836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 227161836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314469792).

227161836 is an abundant number, since it is smaller than the sum of its proper divisors (401777748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

227161836 is a wasteful number, since it uses less digits than its factorization.

227161836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331 (or 2326 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 227161836 is about 15071.8889327118. Note that the first 3 decimals coincide. The cubic root of 227161836 is about 610.1619528775.

The spelling of 227161836 in words is "two hundred twenty-seven million, one hundred sixty-one thousand, eight hundred thirty-six".