81167043 has 8 divisors (see below), whose sum is σ = 108269568. Its totient is φ = 54087944.

The previous prime is 81167039. The next prime is 81167057. The reversal of 81167043 is 34076118.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81167043 - 2² = 81167039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81167043.

It is not an unprimeable number, because it can be changed into a prime (81167063) 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, 5230 + ... + 13772.

It is an arithmetic number, because the mean of its divisors is an integer number (13533696).

Almost surely, 2^81167043 is an apocalyptic number.

81167043 is a deficient number, since it is larger than the sum of its proper divisors (27102525).

81167043 is a wasteful number, since it uses less digits than its factorization.

81167043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11713.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 81167043 is about 9009.2753870664. The cubic root of 81167043 is about 432.9720961205.

The spelling of 81167043 in words is "eighty-one million, one hundred sixty-seven thousand, forty-three".