161915226 has 32 divisors (see below), whose sum is σ = 371865600. Its totient is φ = 46482480.

The previous prime is 161915203. The next prime is 161915233. The reversal of 161915226 is 622519161.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63306 + ... + 65813.

It is an arithmetic number, because the mean of its divisors is an integer number (11620800).

Almost surely, 2^161915226 is an apocalyptic number.

161915226 is an abundant number, since it is smaller than the sum of its proper divisors (209950374).

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

161915226 is a wasteful number, since it uses less digits than its factorization.

161915226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129154.

The product of its digits is 6480, while the sum is 33.

The square root of 161915226 is about 12724.5913883315. The cubic root of 161915226 is about 545.0410720106.

The spelling of 161915226 in words is "one hundred sixty-one million, nine hundred fifteen thousand, two hundred twenty-six".