181956226 has 8 divisors (see below), whose sum is σ = 273478464. Its totient is φ = 90796740.

The previous prime is 181956209. The next prime is 181956227. The reversal of 181956226 is 622659181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (181956227) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 89430 + ... + 91441.

It is an arithmetic number, because the mean of its divisors is an integer number (34184808).

Almost surely, 2^181956226 is an apocalyptic number.

181956226 is a deficient number, since it is larger than the sum of its proper divisors (91522238).

181956226 is a wasteful number, since it uses less digits than its factorization.

181956226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181376.

The product of its digits is 51840, while the sum is 40.

The square root of 181956226 is about 13489.1150932891. The cubic root of 181956226 is about 566.6596731932.

The spelling of 181956226 in words is "one hundred eighty-one million, nine hundred fifty-six thousand, two hundred twenty-six".