231242201 has 6 divisors (see below), whose sum is σ = 239491902. Its totient is φ = 223267520.

The previous prime is 231242191. The next prime is 231242239. The reversal of 231242201 is 102242132.

It can be written as a sum of positive squares in 3 ways, for example, as 931225 + 230310976 = 965^2 + 15176^2 .

It is not a de Polignac number, because 231242201 - 2¹⁴ = 231225817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231242201.

It is not an unprimeable number, because it can be changed into a prime (231242701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136640 + ... + 138321.

It is an arithmetic number, because the mean of its divisors is an integer number (39915317).

Almost surely, 2^231242201 is an apocalyptic number.

It is an amenable number.

231242201 is a deficient number, since it is larger than the sum of its proper divisors (8249701).

231242201 is an equidigital number, since it uses as much as digits as its factorization.

231242201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275019 (or 274990 counting only the distinct ones).

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

The square root of 231242201 is about 15206.6498940431. The cubic root of 231242201 is about 613.7936127948.

Adding to 231242201 its reverse (102242132), we get a palindrome (333484333).

The spelling of 231242201 in words is "two hundred thirty-one million, two hundred forty-two thousand, two hundred one".