100243133 has 4 divisors (see below), whose sum is σ = 100379520. Its totient is φ = 100106748.

The previous prime is 100243079. The next prime is 100243139. The reversal of 100243133 is 331342001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100243133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100243139) 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, 67085 + ... + 68562.

It is an arithmetic number, because the mean of its divisors is an integer number (25094880).

Almost surely, 2^100243133 is an apocalyptic number.

It is an amenable number.

100243133 is a deficient number, since it is larger than the sum of its proper divisors (136387).

100243133 is an equidigital number, since it uses as much as digits as its factorization.

100243133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136386.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 100243133 is about 10012.1492697622. The cubic root of 100243133 is about 464.5347533769.

Adding to 100243133 its reverse (331342001), we get a palindrome (431585134).

The spelling of 100243133 in words is "one hundred million, two hundred forty-three thousand, one hundred thirty-three".