81922268 has 12 divisors (see below), whose sum is σ = 145714632. Its totient is φ = 40289520.

The previous prime is 81922261. The next prime is 81922273. The reversal of 81922268 is 86222918.

It is a super-2 number, since 2×81922268² = 13422515988527648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81922261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167630 + ... + 168117.

It is an arithmetic number, because the mean of its divisors is an integer number (12142886).

Almost surely, 2^81922268 is an apocalyptic number.

It is an amenable number.

81922268 is a deficient number, since it is larger than the sum of its proper divisors (63792364).

81922268 is a wasteful number, since it uses less digits than its factorization.

81922268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335812 (or 335810 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 81922268 is about 9051.0920888034. The cubic root of 81922268 is about 434.3108266255.

The spelling of 81922268 in words is "eighty-one million, nine hundred twenty-two thousand, two hundred sixty-eight".