81022445 has 16 divisors (see below), whose sum is σ = 115948800. Its totient is φ = 53142144.

The previous prime is 81022427. The next prime is 81022453. The reversal of 81022445 is 54422018.

It is a happy number.

It is not a de Polignac number, because 81022445 - 2¹² = 81018349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49520 + ... + 51129.

It is an arithmetic number, because the mean of its divisors is an integer number (7246800).

Almost surely, 2^81022445 is an apocalyptic number.

It is an amenable number.

81022445 is a deficient number, since it is larger than the sum of its proper divisors (34926355).

81022445 is a wasteful number, since it uses less digits than its factorization.

81022445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100684.

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

The square root of 81022445 is about 9001.2468580747. The cubic root of 81022445 is about 432.7148319590.

The spelling of 81022445 in words is "eighty-one million, twenty-two thousand, four hundred forty-five".