81922466 has 8 divisors (see below), whose sum is σ = 123151644. Its totient is φ = 40871920.

The previous prime is 81922409. The next prime is 81922501. The reversal of 81922466 is 66422918.

It can be written as a sum of positive squares in 2 ways, for example, as 75777025 + 6145441 = 8705^2 + 2479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81922466² = 13422580871042312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43505 + ... + 45348.

Almost surely, 2^81922466 is an apocalyptic number.

81922466 is a deficient number, since it is larger than the sum of its proper divisors (41229178).

81922466 is a wasteful number, since it uses less digits than its factorization.

81922466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89316.

The product of its digits is 41472, while the sum is 38.

The square root of 81922466 is about 9051.1030267034. The cubic root of 81922466 is about 434.3111765241.

The spelling of 81922466 in words is "eighty-one million, nine hundred twenty-two thousand, four hundred sixty-six".