81827222 has 8 divisors (see below), whose sum is σ = 129960936. Its totient is φ = 38506912.

The previous prime is 81827203. The next prime is 81827231. The reversal of 81827222 is 22272818.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203308 + ... + 1203375.

It is an arithmetic number, because the mean of its divisors is an integer number (16245117).

Almost surely, 2^81827222 is an apocalyptic number.

81827222 is a deficient number, since it is larger than the sum of its proper divisors (48133714).

81827222 is a wasteful number, since it uses less digits than its factorization.

81827222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406702.

The product of its digits is 7168, while the sum is 32.

The square root of 81827222 is about 9045.8400383823. The cubic root of 81827222 is about 434.1427995340.

The spelling of 81827222 in words is "eighty-one million, eight hundred twenty-seven thousand, two hundred twenty-two".