231235201 has 4 divisors (see below), whose sum is σ = 235026004. Its totient is φ = 227444400.

The previous prime is 231235171. The next prime is 231235229. The reversal of 231235201 is 102532132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76108176 + 155127025 = 8724^2 + 12455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231235201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231235271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895310 + ... + 1895431.

It is an arithmetic number, because the mean of its divisors is an integer number (58756501).

Almost surely, 2^231235201 is an apocalyptic number.

It is an amenable number.

231235201 is a deficient number, since it is larger than the sum of its proper divisors (3790803).

231235201 is an equidigital number, since it uses as much as digits as its factorization.

231235201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790802.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231235201 is about 15206.4197298378. The cubic root of 231235201 is about 613.7874192906.

Adding to 231235201 its reverse (102532132), we get a palindrome (333767333).

The spelling of 231235201 in words is "two hundred thirty-one million, two hundred thirty-five thousand, two hundred one".