81433042 has 16 divisors (see below), whose sum is σ = 125107200. Its totient is φ = 39742560.

The previous prime is 81433021. The next prime is 81433057. The reversal of 81433042 is 24033418.

It is a junction number, because it is equal to n+sod(n) for n = 81432998 and 81433016.

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, 11167 + ... + 16957.

It is an arithmetic number, because the mean of its divisors is an integer number (7819200).

Almost surely, 2^81433042 is an apocalyptic number.

81433042 is a deficient number, since it is larger than the sum of its proper divisors (43674158).

81433042 is a wasteful number, since it uses less digits than its factorization.

81433042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5961.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 81433042 is about 9024.0258199985. The cubic root of 81433042 is about 433.4445561971. Note that the first 3 decimals are identical.

It can be divided in two parts, 814 and 33042, that added together give a square (33856 = 184²).

The spelling of 81433042 in words is "eighty-one million, four hundred thirty-three thousand, forty-two".