81182622 has 16 divisors (see below), whose sum is σ = 162552960. Its totient is φ = 27029592.

The previous prime is 81182603. The next prime is 81182623. The reversal of 81182622 is 22628118.

It is a super-2 number, since 2×81182622² = 13181236229589768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81182622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81182623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1848 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (10159560).

Almost surely, 2^81182622 is an apocalyptic number.

81182622 is an abundant number, since it is smaller than the sum of its proper divisors (81370338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81182622 is a wasteful number, since it uses less digits than its factorization.

81182622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15647.

The product of its digits is 3072, while the sum is 30.

The square root of 81182622 is about 9010.1399545179. The cubic root of 81182622 is about 432.9997955435. Note that the first 3 decimals are identical.

The spelling of 81182622 in words is "eighty-one million, one hundred eighty-two thousand, six hundred twenty-two".