81633422 has 24 divisors (see below), whose sum is σ = 140403456. Its totient is φ = 35458176.

The previous prime is 81633421. The next prime is 81633427. The reversal of 81633422 is 22433618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81633421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1358 + ... + 12849.

It is an arithmetic number, because the mean of its divisors is an integer number (5850144).

Almost surely, 2^81633422 is an apocalyptic number.

81633422 is a deficient number, since it is larger than the sum of its proper divisors (58770034).

81633422 is a wasteful number, since it uses less digits than its factorization.

81633422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14252 (or 14239 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 81633422 is about 9035.1215819158. The cubic root of 81633422 is about 433.7997866041.

The spelling of 81633422 in words is "eighty-one million, six hundred thirty-three thousand, four hundred twenty-two".