231243001 has 4 divisors (see below), whose sum is σ = 252265104. Its totient is φ = 210220900.

The previous prime is 231242969. The next prime is 231243011. The reversal of 231243001 is 100342132.

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 not a de Polignac number, because 231243001 - 2⁵ = 231242969 is a prime.

It is a super-2 number, since 2×231243001² = 106946651022972002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231243011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10511035 + ... + 10511056.

It is an arithmetic number, because the mean of its divisors is an integer number (63066276).

Almost surely, 2^231243001 is an apocalyptic number.

It is an amenable number.

231243001 is a deficient number, since it is larger than the sum of its proper divisors (21022103).

231243001 is a wasteful number, since it uses less digits than its factorization.

231243001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21022102.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231243001 is about 15206.6761983018. The cubic root of 231243001 is about 613.7943206159.

Adding to 231243001 its reverse (100342132), we get a palindrome (331585133).

The spelling of 231243001 in words is "two hundred thirty-one million, two hundred forty-three thousand, one".