81418226 has 8 divisors (see below), whose sum is σ = 123269040. Its totient is φ = 40328548.

The previous prime is 81418223. The next prime is 81418261. The reversal of 81418226 is 62281418.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 81418192 and 81418201.

It is not an unprimeable number, because it can be changed into a prime (81418223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190016 + ... + 190443.

It is an arithmetic number, because the mean of its divisors is an integer number (15408630).

Almost surely, 2^81418226 is an apocalyptic number.

81418226 is a deficient number, since it is larger than the sum of its proper divisors (41850814).

81418226 is a wasteful number, since it uses less digits than its factorization.

81418226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380568.

The product of its digits is 6144, while the sum is 32.

The square root of 81418226 is about 9023.2048630185. The cubic root of 81418226 is about 433.4182675068.

The spelling of 81418226 in words is "eighty-one million, four hundred eighteen thousand, two hundred twenty-six".