100540243 has 4 divisors (see below), whose sum is σ = 100838920. Its totient is φ = 100241568.

The previous prime is 100540201. The next prime is 100540247. The reversal of 100540243 is 342045001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342045001 = 41 ⋅8342561.

It is a cyclic number.

It is not a de Polignac number, because 100540243 - 2¹³ = 100532051 is a prime.

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 100540243.

It is not an unprimeable number, because it can be changed into a prime (100540247) 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, 148833 + ... + 149506.

It is an arithmetic number, because the mean of its divisors is an integer number (25209730).

Almost surely, 2^100540243 is an apocalyptic number.

100540243 is a deficient number, since it is larger than the sum of its proper divisors (298677).

100540243 is an equidigital number, since it uses as much as digits as its factorization.

100540243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298676.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 100540243 is about 10026.9757654040. The cubic root of 100540243 is about 464.9932445930.

Adding to 100540243 its reverse (342045001), we get a palindrome (442585244).

The spelling of 100540243 in words is "one hundred million, five hundred forty thousand, two hundred forty-three".