81411082 has 4 divisors (see below), whose sum is σ = 122116626. Its totient is φ = 40705540.

The previous prime is 81411047. The next prime is 81411089. The reversal of 81411082 is 28011418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28011418 = 2 ⋅14005709.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 249001 = 9009^2 + 499^2 .

It is not an unprimeable number, because it can be changed into a prime (81411089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20352769 + ... + 20352772.

Almost surely, 2^81411082 is an apocalyptic number.

81411082 is a deficient number, since it is larger than the sum of its proper divisors (40705544).

81411082 is a wasteful number, since it uses less digits than its factorization.

81411082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40705543.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 81411082 is about 9022.8089861196. The cubic root of 81411082 is about 433.4055904490.

The spelling of 81411082 in words is "eighty-one million, four hundred eleven thousand, eighty-two".