161273227 has 2 divisors, whose sum is σ = 161273228. Its totient is φ = 161273226.

The previous prime is 161273219. The next prime is 161273293. The reversal of 161273227 is 722372161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161273227 - 2³ = 161273219 is a prime.

It is not a weakly prime, because it can be changed into another prime (161273627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80636613 + 80636614.

It is an arithmetic number, because the mean of its divisors is an integer number (80636614).

Almost surely, 2^161273227 is an apocalyptic number.

161273227 is a deficient number, since it is larger than the sum of its proper divisors (1).

161273227 is an equidigital number, since it uses as much as digits as its factorization.

161273227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 161273227 is about 12699.3396285004. The cubic root of 161273227 is about 544.3197494414.

The spelling of 161273227 in words is "one hundred sixty-one million, two hundred seventy-three thousand, two hundred twenty-seven".