81924122 has 32 divisors (see below), whose sum is σ = 150139008. Its totient is φ = 32726016.

The previous prime is 81924119. The next prime is 81924127. The reversal of 81924122 is 22142918.

It is not an unprimeable number, because it can be changed into a prime (81924127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23858 + ... + 27074.

It is an arithmetic number, because the mean of its divisors is an integer number (4691844).

Almost surely, 2^81924122 is an apocalyptic number.

81924122 is a deficient number, since it is larger than the sum of its proper divisors (68214886).

81924122 is a wasteful number, since it uses less digits than its factorization.

81924122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350.

The product of its digits is 2304, while the sum is 29.

The square root of 81924122 is about 9051.1945068041. The cubic root of 81924122 is about 434.3141029272.

The spelling of 81924122 in words is "eighty-one million, nine hundred twenty-four thousand, one hundred twenty-two".