243100431 has 12 divisors (see below), whose sum is σ = 401308752. Its totient is φ = 138914496.

The previous prime is 243100427. The next prime is 243100511. The reversal of 243100431 is 134001342.

It is not a de Polignac number, because 243100431 - 2² = 243100427 is a prime.

It is a super-2 number, since 2×243100431² = 118195639104771522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243100831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1929306 + ... + 1929431.

It is an arithmetic number, because the mean of its divisors is an integer number (33442396).

Almost surely, 2^243100431 is an apocalyptic number.

243100431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

243100431 is a deficient number, since it is larger than the sum of its proper divisors (158208321).

243100431 is a wasteful number, since it uses less digits than its factorization.

243100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858750 (or 3858747 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 243100431 is about 15591.6782611751. The cubic root of 243100431 is about 624.1111041687. Note that the first 4 decimals are identical.

Adding to 243100431 its reverse (134001342), we get a palindrome (377101773).

The spelling of 243100431 in words is "two hundred forty-three million, one hundred thousand, four hundred thirty-one".