81227344 has 40 divisors (see below), whose sum is σ = 175694112. Its totient is φ = 36059520.

The previous prime is 81227303. The next prime is 81227351. The reversal of 81227344 is 44372218.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2202 + ... + 12934.

Almost surely, 2^81227344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81227344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87847056).

81227344 is an abundant number, since it is smaller than the sum of its proper divisors (94466768).

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

81227344 is a wasteful number, since it uses less digits than its factorization.

81227344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10795 (or 10789 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 81227344 is about 9012.6213722757. The cubic root of 81227344 is about 433.0792914651.

The spelling of 81227344 in words is "eighty-one million, two hundred twenty-seven thousand, three hundred forty-four".