81226230 has 16 divisors (see below), whose sum is σ = 194943024. Its totient is φ = 21660320.

The previous prime is 81226219. The next prime is 81226237. The reversal of 81226230 is 3262218.

It is a self number, because there is not a number n which added to its sum of digits gives 81226230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81226237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353741 + ... + 1353800.

It is an arithmetic number, because the mean of its divisors is an integer number (12183939).

Almost surely, 2^81226230 is an apocalyptic number.

81226230 is an abundant number, since it is smaller than the sum of its proper divisors (113716794).

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

81226230 is a wasteful number, since it uses less digits than its factorization.

81226230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707551.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 81226230 is about 9012.5595698447. The cubic root of 81226230 is about 433.0773116206.

Adding to 81226230 its reverse (3262218), we get a palindrome (84488448).

The spelling of 81226230 in words is "eighty-one million, two hundred twenty-six thousand, two hundred thirty".