81283283 has 4 divisors (see below), whose sum is σ = 81543288. Its totient is φ = 81023280.

The previous prime is 81283249. The next prime is 81283303. The reversal of 81283283 is 38238218.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81283283 - 2¹⁰ = 81282259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81283243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129533 + ... + 130158.

It is an arithmetic number, because the mean of its divisors is an integer number (20385822).

Almost surely, 2^81283283 is an apocalyptic number.

81283283 is a deficient number, since it is larger than the sum of its proper divisors (260005).

81283283 is a wasteful number, since it uses less digits than its factorization.

81283283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260004.

The product of its digits is 18432, while the sum is 35.

The square root of 81283283 is about 9015.7242082930. The cubic root of 81283283 is about 433.1786851839.

It can be divided in two parts, 8128 and 3283, that added together give a palindrome (11411).

The spelling of 81283283 in words is "eighty-one million, two hundred eighty-three thousand, two hundred eighty-three".