81183022 has 12 divisors (see below), whose sum is σ = 122678208. Its totient is φ = 40291400.

The previous prime is 81182989. The next prime is 81183043. The reversal of 81183022 is 22038118.

It is a super-2 number, since 2×81183022² = 13181366122104968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175872 + ... + 176332.

It is an arithmetic number, because the mean of its divisors is an integer number (10223184).

Almost surely, 2^81183022 is an apocalyptic number.

81183022 is a deficient number, since it is larger than the sum of its proper divisors (41495186).

81183022 is an equidigital number, since it uses as much as digits as its factorization.

81183022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 81183022 is about 9010.1621517040. The cubic root of 81183022 is about 433.0005066958. Note that the first 3 decimals are identical.

The spelling of 81183022 in words is "eighty-one million, one hundred eighty-three thousand, twenty-two".