81291114 has 40 divisors (see below), whose sum is σ = 188039808. Its totient is φ = 26221320.

The previous prime is 81291097. The next prime is 81291173. The reversal of 81291114 is 41119218.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3072 + ... + 13115.

Almost surely, 2^81291114 is an apocalyptic number.

81291114 is an abundant number, since it is smaller than the sum of its proper divisors (106748694).

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

81291114 is a wasteful number, since it uses less digits than its factorization.

81291114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16232 (or 16223 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 81291114 is about 9016.1584946140. The cubic root of 81291114 is about 433.1925958480.

The spelling of 81291114 in words is "eighty-one million, two hundred ninety-one thousand, one hundred fourteen".