81043406 has 8 divisors (see below), whose sum is σ = 121610160. Its totient is φ = 40506688.

The previous prime is 81043397. The next prime is 81043409. The reversal of 81043406 is 60434018.

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

It is a super-5 number, since 5×81043406⁵ (a number of 41 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81043409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (15201270).

Almost surely, 2^81043406 is an apocalyptic number.

81043406 is a deficient number, since it is larger than the sum of its proper divisors (40566754).

81043406 is a wasteful number, since it uses less digits than its factorization.

81043406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15018.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 81043406 is about 9002.4111214718. The cubic root of 81043406 is about 432.7521440624.

The spelling of 81043406 in words is "eighty-one million, forty-three thousand, four hundred six".