161442227 has 8 divisors (see below), whose sum is σ = 165055296. Its totient is φ = 157836672.

The previous prime is 161442191. The next prime is 161442247. The reversal of 161442227 is 722244161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161442227 - 2⁶ = 161442163 is a prime.

It is a super-3 number, since 3×161442227³ (a number of 26 digits) contains 333 as substring.

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 161442227.

It is not an unprimeable number, because it can be changed into a prime (161442247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82553 + ... + 84485.

It is an arithmetic number, because the mean of its divisors is an integer number (20631912).

Almost surely, 2^161442227 is an apocalyptic number.

161442227 is a deficient number, since it is larger than the sum of its proper divisors (3613069).

161442227 is a wasteful number, since it uses less digits than its factorization.

161442227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757.

The product of its digits is 5376, while the sum is 29.

The square root of 161442227 is about 12705.9917755365. The cubic root of 161442227 is about 544.5098159631.

Adding to 161442227 its reverse (722244161), we get a palindrome (883686388).

The spelling of 161442227 in words is "one hundred sixty-one million, four hundred forty-two thousand, two hundred twenty-seven".