81330034 has 4 divisors (see below), whose sum is σ = 121995054. Its totient is φ = 40665016.

The previous prime is 81330017. The next prime is 81330049. The reversal of 81330034 is 43003318.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 33097009 = 6945^2 + 5753^2 .

It is a super-2 number, since 2×81330034² = 13229148860882312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81329987 and 81330014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20332507 + ... + 20332510.

Almost surely, 2^81330034 is an apocalyptic number.

81330034 is a deficient number, since it is larger than the sum of its proper divisors (40665020).

81330034 is a wasteful number, since it uses less digits than its factorization.

81330034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40665019.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 81330034 is about 9018.3165834872. The cubic root of 81330034 is about 433.2617184742.

The spelling of 81330034 in words is "eighty-one million, three hundred thirty thousand, thirty-four".