81982227 has 8 divisors (see below), whose sum is σ = 109366416. Its totient is φ = 54626432.

The previous prime is 81982213. The next prime is 81982237. The reversal of 81982227 is 72228918.

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

It is a cyclic number.

It is not a de Polignac number, because 81982227 - 2⁷ = 81982099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81982237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943 + ... + 12839.

It is an arithmetic number, because the mean of its divisors is an integer number (13670802).

Almost surely, 2^81982227 is an apocalyptic number.

81982227 is a deficient number, since it is larger than the sum of its proper divisors (27384189).

81982227 is a wasteful number, since it uses less digits than its factorization.

81982227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14197.

The product of its digits is 32256, while the sum is 39.

The square root of 81982227 is about 9054.4037351998. The cubic root of 81982227 is about 434.4167583132.

The spelling of 81982227 in words is "eighty-one million, nine hundred eighty-two thousand, two hundred twenty-seven".