81833142 has 16 divisors (see below), whose sum is σ = 164228400. Its totient is φ = 27184032.

The previous prime is 81833137. The next prime is 81833153. The reversal of 81833142 is 24133818.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21517 + ... + 25032.

It is an arithmetic number, because the mean of its divisors is an integer number (10264275).

Almost surely, 2^81833142 is an apocalyptic number.

81833142 is an abundant number, since it is smaller than the sum of its proper divisors (82395258).

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

81833142 is a wasteful number, since it uses less digits than its factorization.

81833142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46847.

The product of its digits is 4608, while the sum is 30.

The square root of 81833142 is about 9046.1672546996. The cubic root of 81833142 is about 434.1532690059.

It can be divided in two parts, 8183 and 3142, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 81833142 in words is "eighty-one million, eight hundred thirty-three thousand, one hundred forty-two".