81302322 has 16 divisors (see below), whose sum is σ = 163038240. Its totient is φ = 27028512.

The previous prime is 81302317. The next prime is 81302323. The reversal of 81302322 is 22320318.

It is a super-2 number, since 2×81302322² = 13220135125183368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81302323) 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, 15603 + ... + 20150.

It is an arithmetic number, because the mean of its divisors is an integer number (10189890).

Almost surely, 2^81302322 is an apocalyptic number.

81302322 is an abundant number, since it is smaller than the sum of its proper divisors (81735918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81302322 is a wasteful number, since it uses less digits than its factorization.

81302322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36137.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 81302322 is about 9016.7800239332. The cubic root of 81302322 is about 433.2125037209.

The spelling of 81302322 in words is "eighty-one million, three hundred two thousand, three hundred twenty-two".