81333834 has 8 divisors (see below), whose sum is σ = 162667680. Its totient is φ = 27111276.

The previous prime is 81333823. The next prime is 81333859. The reversal of 81333834 is 43833318.

It is a sphenic number, since it is the product of 3 distinct primes.

81333834 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 81333795 and 81333804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6777814 + ... + 6777825.

It is an arithmetic number, because the mean of its divisors is an integer number (20333460).

Almost surely, 2^81333834 is an apocalyptic number.

81333834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81333834 is a wasteful number, since it uses less digits than its factorization.

81333834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13555644.

The product of its digits is 20736, while the sum is 33.

The square root of 81333834 is about 9018.5272633618. The cubic root of 81333834 is about 433.2684661614.

The spelling of 81333834 in words is "eighty-one million, three hundred thirty-three thousand, eight hundred thirty-four".