81941226 has 16 divisors (see below), whose sum is σ = 171008064. Its totient is φ = 26126144.

The previous prime is 81941219. The next prime is 81941227. The reversal of 81941226 is 62214918.

It is not an unprimeable number, because it can be changed into a prime (81941227) 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 7 ways as a sum of consecutive naturals, for example, 296751 + ... + 297026.

It is an arithmetic number, because the mean of its divisors is an integer number (10688004).

Almost surely, 2^81941226 is an apocalyptic number.

81941226 is an abundant number, since it is smaller than the sum of its proper divisors (89066838).

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

81941226 is a wasteful number, since it uses less digits than its factorization.

81941226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593805.

The product of its digits is 6912, while the sum is 33.

The square root of 81941226 is about 9052.1393051588. The cubic root of 81941226 is about 434.3443259812.

The spelling of 81941226 in words is "eighty-one million, nine hundred forty-one thousand, two hundred twenty-six".