81082058 has 4 divisors (see below), whose sum is σ = 121623090. Its totient is φ = 40541028.

The previous prime is 81082033. The next prime is 81082073. The reversal of 81082058 is 85028018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85028018 = 2 ⋅42514009.

It can be written as a sum of positive squares in only one way, i.e., 69839449 + 11242609 = 8357^2 + 3353^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20270513 + ... + 20270516.

Almost surely, 2^81082058 is an apocalyptic number.

81082058 is a deficient number, since it is larger than the sum of its proper divisors (40541032).

81082058 is a wasteful number, since it uses less digits than its factorization.

81082058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40541031.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 81082058 is about 9004.5576237814. The cubic root of 81082058 is about 432.8209305651.

The spelling of 81082058 in words is "eighty-one million, eighty-two thousand, fifty-eight".