81082442 has 16 divisors (see below), whose sum is σ = 139708800. Its totient is φ = 34572048.

The previous prime is 81082439. The next prime is 81082457. The reversal of 81082442 is 24428018.

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, 11942 + ... + 17457.

It is an arithmetic number, because the mean of its divisors is an integer number (8731800).

Almost surely, 2^81082442 is an apocalyptic number.

81082442 is a deficient number, since it is larger than the sum of its proper divisors (58626358).

81082442 is a wasteful number, since it uses less digits than its factorization.

81082442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29605.

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 81082442 is about 9004.5789462917. The cubic root of 81082442 is about 432.8216138358.

The spelling of 81082442 in words is "eighty-one million, eighty-two thousand, four hundred forty-two".