81350043 has 8 divisors (see below), whose sum is σ = 109773888. Its totient is φ = 53579784.

The previous prime is 81350033. The next prime is 81350047. The reversal of 81350043 is 34005318.

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

It is not a de Polignac number, because 81350043 - 2⁶ = 81349979 is a prime.

It is a super-2 number, since 2×81350043² = 13235658992203698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81349995 and 81350022.

It is not an unprimeable number, because it can be changed into a prime (81350047) 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, 163105 + ... + 163602.

It is an arithmetic number, because the mean of its divisors is an integer number (13721736).

Almost surely, 2^81350043 is an apocalyptic number.

81350043 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

81350043 is a deficient number, since it is larger than the sum of its proper divisors (28423845).

81350043 is a wasteful number, since it uses less digits than its factorization.

81350043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326793.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 81350043 is about 9019.4258686460. The cubic root of 81350043 is about 433.2972462387.

The spelling of 81350043 in words is "eighty-one million, three hundred fifty thousand, forty-three".