81083287 has 8 divisors (see below), whose sum is σ = 83059200. Its totient is φ = 79127544.

The previous prime is 81083273. The next prime is 81083297. The reversal of 81083287 is 78238018.

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

It is a cyclic number.

It is not a de Polignac number, because 81083287 - 2¹⁹ = 80558999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81083227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3258 + ... + 13144.

It is an arithmetic number, because the mean of its divisors is an integer number (10382400).

Almost surely, 2^81083287 is an apocalyptic number.

81083287 is a deficient number, since it is larger than the sum of its proper divisors (1975913).

81083287 is a wasteful number, since it uses less digits than its factorization.

81083287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 81083287 is about 9004.6258667420. The cubic root of 81083287 is about 432.8231173795.

The spelling of 81083287 in words is "eighty-one million, eighty-three thousand, two hundred eighty-seven".