161226256 has 20 divisors (see below), whose sum is σ = 312989392. Its totient is φ = 80454816.

The previous prime is 161226203. The next prime is 161226271. The reversal of 161226256 is 652622161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266 + ... + 18001.

Almost surely, 2^161226256 is an apocalyptic number.

161226256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161226256 is a deficient number, since it is larger than the sum of its proper divisors (151763136).

161226256 is a wasteful number, since it uses less digits than its factorization.

161226256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19798 (or 19792 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 161226256 is about 12697.4901456941. The cubic root of 161226256 is about 544.2668997404.

The spelling of 161226256 in words is "one hundred sixty-one million, two hundred twenty-six thousand, two hundred fifty-six".