161667227 has 2 divisors, whose sum is σ = 161667228. Its totient is φ = 161667226.

The previous prime is 161667221. The next prime is 161667239. The reversal of 161667227 is 722766161.

161667227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161667227 - 2⁴ = 161667211 is a prime.

It is a super-2 number, since 2×161667227² = 52272584571739058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161667221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80833613 + 80833614.

It is an arithmetic number, because the mean of its divisors is an integer number (80833614).

Almost surely, 2^161667227 is an apocalyptic number.

161667227 is a deficient number, since it is larger than the sum of its proper divisors (1).

161667227 is an equidigital number, since it uses as much as digits as its factorization.

161667227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 161667227 is about 12714.8427831413. The cubic root of 161667227 is about 544.7626573648.

The spelling of 161667227 in words is "one hundred sixty-one million, six hundred sixty-seven thousand, two hundred twenty-seven".