81003043 has 8 divisors (see below), whose sum is σ = 90247680. Its totient is φ = 72071880.

The previous prime is 81003029. The next prime is 81003053. The reversal of 81003043 is 34030018.

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 81003043 - 2¹⁷ = 80871971 is a prime.

It is a super-2 number, since 2×81003043² = 13122985950519698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81003043.

It is not an unprimeable number, because it can be changed into a prime (81003053) 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, 77823 + ... + 78856.

It is an arithmetic number, because the mean of its divisors is an integer number (11280960).

Almost surely, 2^81003043 is an apocalyptic number.

81003043 is a deficient number, since it is larger than the sum of its proper divisors (9244637).

81003043 is a wasteful number, since it uses less digits than its factorization.

81003043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156737.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 81003043 is about 9000.1690539678. The cubic root of 81003043 is about 432.6802892533.

The spelling of 81003043 in words is "eighty-one million, three thousand, forty-three".