100442231 has 4 divisors (see below), whose sum is σ = 100473264. Its totient is φ = 100411200.

The previous prime is 100442207. The next prime is 100442269. The reversal of 100442231 is 132244001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100442231 is a prime.

It is a super-2 number, since 2×100442231² = 20177283536514722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100442731) 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, 10010 + ... + 17351.

It is an arithmetic number, because the mean of its divisors is an integer number (25118316).

Almost surely, 2^100442231 is an apocalyptic number.

100442231 is a deficient number, since it is larger than the sum of its proper divisors (31033).

100442231 is an equidigital number, since it uses as much as digits as its factorization.

100442231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31032.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 100442231 is about 10022.0871578729. The cubic root of 100442231 is about 464.8420953809.

Adding to 100442231 its reverse (132244001), we get a palindrome (232686232).

The spelling of 100442231 in words is "one hundred million, four hundred forty-two thousand, two hundred thirty-one".