81583054 has 8 divisors (see below), whose sum is σ = 139856688. Its totient is φ = 34964160.

The previous prime is 81583043. The next prime is 81583057. The reversal of 81583054 is 45038518.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81583057) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2913667 + ... + 2913694.

It is an arithmetic number, because the mean of its divisors is an integer number (17482086).

Almost surely, 2^81583054 is an apocalyptic number.

81583054 is a deficient number, since it is larger than the sum of its proper divisors (58273634).

81583054 is a wasteful number, since it uses less digits than its factorization.

81583054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827370.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 81583054 is about 9032.3338069405. Note that the first 3 decimals coincide. The cubic root of 81583054 is about 433.7105497760.

The spelling of 81583054 in words is "eighty-one million, five hundred eighty-three thousand, fifty-four".