2161433227 has 32 divisors (see below), whose sum is σ = 2438802432. Its totient is φ = 1906404864.

The previous prime is 2161433213. The next prime is 2161433231. The reversal of 2161433227 is 7223341612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2161433227 - 2¹¹ = 2161431179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161433207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1820328 + ... + 1821514.

It is an arithmetic number, because the mean of its divisors is an integer number (76212576).

Almost surely, 2^2161433227 is an apocalyptic number.

2161433227 is a deficient number, since it is larger than the sum of its proper divisors (277369205).

2161433227 is a wasteful number, since it uses less digits than its factorization.

2161433227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347.

The product of its digits is 12096, while the sum is 31.

The square root of 2161433227 is about 46491.2166650863. The cubic root of 2161433227 is about 1292.9466576553.

Adding to 2161433227 its reverse (7223341612), we get a palindrome (9384774839).

The spelling of 2161433227 in words is "two billion, one hundred sixty-one million, four hundred thirty-three thousand, two hundred twenty-seven".