161273226 has 16 divisors (see below), whose sum is σ = 324602784. Its totient is φ = 53415024.

The previous prime is 161273219. The next prime is 161273227. The reversal of 161273226 is 622372161.

161273226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161273193 and 161273202.

It is not an unprimeable number, because it can be changed into a prime (161273227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84660 + ... + 86543.

It is an arithmetic number, because the mean of its divisors is an integer number (20287674).

Almost surely, 2^161273226 is an apocalyptic number.

161273226 is an abundant number, since it is smaller than the sum of its proper divisors (163329558).

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

161273226 is a wasteful number, since it uses less digits than its factorization.

161273226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171365.

The product of its digits is 6048, while the sum is 30.

The square root of 161273226 is about 12699.3395891282. The cubic root of 161273226 is about 544.3197483164.

The spelling of 161273226 in words is "one hundred sixty-one million, two hundred seventy-three thousand, two hundred twenty-six".