81829322 has 4 divisors (see below), whose sum is σ = 122743986. Its totient is φ = 40914660.

The previous prime is 81829273. The next prime is 81829327. The reversal of 81829322 is 22392818.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 76405081 + 5424241 = 8741^2 + 2329^2 .

It is not an unprimeable number, because it can be changed into a prime (81829327) 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 as a sum of consecutive naturals, namely, 20457329 + ... + 20457332.

Almost surely, 2^81829322 is an apocalyptic number.

81829322 is a deficient number, since it is larger than the sum of its proper divisors (40914664).

81829322 is a wasteful number, since it uses less digits than its factorization.

81829322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40914663.

The product of its digits is 13824, while the sum is 35.

The square root of 81829322 is about 9045.9561130927. The cubic root of 81829322 is about 434.1465134247.

The spelling of 81829322 in words is "eighty-one million, eight hundred twenty-nine thousand, three hundred twenty-two".