81422522 has 16 divisors (see below), whose sum is σ = 125286912. Its totient is φ = 39670800.

The previous prime is 81422519. The next prime is 81422527. The reversal of 81422522 is 22522418.

It is a junction number, because it is equal to n+sod(n) for n = 81422491 and 81422500.

It is not an unprimeable number, because it can be changed into a prime (81422527) 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, 13463 + ... + 18549.

It is an arithmetic number, because the mean of its divisors is an integer number (7830432).

Almost surely, 2^81422522 is an apocalyptic number.

81422522 is a deficient number, since it is larger than the sum of its proper divisors (43864390).

81422522 is a wasteful number, since it uses less digits than its factorization.

81422522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293.

The product of its digits is 2560, while the sum is 26.

The square root of 81422522 is about 9023.4429127689. The cubic root of 81422522 is about 433.4258904197.

The spelling of 81422522 in words is "eighty-one million, four hundred twenty-two thousand, five hundred twenty-two".