81182283 has 16 divisors (see below), whose sum is σ = 133222656. Its totient is φ = 42821280.

The previous prime is 81182279. The next prime is 81182303. The reversal of 81182283 is 38228118.

It is not a de Polignac number, because 81182283 - 2² = 81182279 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81182243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148413 + ... + 148958.

It is an arithmetic number, because the mean of its divisors is an integer number (8326416).

Almost surely, 2^81182283 is an apocalyptic number.

81182283 is a deficient number, since it is larger than the sum of its proper divisors (52040373).

81182283 is a wasteful number, since it uses less digits than its factorization.

81182283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297394.

The product of its digits is 6144, while the sum is 33.

The square root of 81182283 is about 9010.1211423599. The cubic root of 81182283 is about 432.9991928400. Note that the first 3 decimals are identical.

It can be divided in two parts, 8118 and 2283, that added together give a palindrome (10401).

The spelling of 81182283 in words is "eighty-one million, one hundred eighty-two thousand, two hundred eighty-three".