81283263 has 8 divisors (see below), whose sum is σ = 108421248. Its totient is φ = 54167064.

The previous prime is 81283249. The next prime is 81283303. The reversal of 81283263 is 36238218.

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

It is not a de Polignac number, because 81283263 - 2⁴ = 81283247 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 8020 + ... + 15062.

It is an arithmetic number, because the mean of its divisors is an integer number (13552656).

Almost surely, 2^81283263 is an apocalyptic number.

81283263 is a deficient number, since it is larger than the sum of its proper divisors (27137985).

81283263 is a wasteful number, since it uses less digits than its factorization.

81283263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10893.

The product of its digits is 13824, while the sum is 33.

The square root of 81283263 is about 9015.7230991197. The cubic root of 81283263 is about 433.1786496555.

The spelling of 81283263 in words is "eighty-one million, two hundred eighty-three thousand, two hundred sixty-three".