81043107 has 8 divisors (see below), whose sum is σ = 109127760. Its totient is φ = 53493600.

The previous prime is 81043103. The next prime is 81043117. The reversal of 81043107 is 70134018.

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

It is not a de Polignac number, because 81043107 - 2² = 81043103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81043103) 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, 133432 + ... + 134037.

It is an arithmetic number, because the mean of its divisors is an integer number (13640970).

Almost surely, 2^81043107 is an apocalyptic number.

81043107 is a deficient number, since it is larger than the sum of its proper divisors (28084653).

81043107 is a wasteful number, since it uses less digits than its factorization.

81043107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267573.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81043107 is about 9002.3945147944. The cubic root of 81043107 is about 432.7516118659.

It can be divided in two parts, 8104 and 3107, that added together give a palindrome (11211).

The spelling of 81043107 in words is "eighty-one million, forty-three thousand, one hundred seven".