100243043 has 4 divisors (see below), whose sum is σ = 100803240. Its totient is φ = 99682848.

The previous prime is 100243007. The next prime is 100243061. The reversal of 100243043 is 340342001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340342001 = 4703 ⋅72367.

It is a cyclic number.

It is not a de Polignac number, because 100243043 - 2¹⁰ = 100242019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100243063) 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, 279830 + ... + 280187.

It is an arithmetic number, because the mean of its divisors is an integer number (25200810).

Almost surely, 2^100243043 is an apocalyptic number.

100243043 is a deficient number, since it is larger than the sum of its proper divisors (560197).

100243043 is an equidigital number, since it uses as much as digits as its factorization.

100243043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560196.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 100243043 is about 10012.1447752217. The cubic root of 100243043 is about 464.5346143545.

Adding to 100243043 its reverse (340342001), we get a palindrome (440585044).

The spelling of 100243043 in words is "one hundred million, two hundred forty-three thousand, forty-three".