231503201 has 16 divisors (see below), whose sum is σ = 252979200. Its totient is φ = 211010688.

The previous prime is 231503183. The next prime is 231503203. The reversal of 231503201 is 102305132.

It is a cyclic number.

It is not a de Polignac number, because 231503201 - 2⁶ = 231503137 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 231503201.

It is not an unprimeable number, because it can be changed into a prime (231503203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210485 + ... + 211581.

It is an arithmetic number, because the mean of its divisors is an integer number (15811200).

Almost surely, 2^231503201 is an apocalyptic number.

It is an amenable number.

231503201 is a deficient number, since it is larger than the sum of its proper divisors (21475999).

231503201 is a wasteful number, since it uses less digits than its factorization.

231503201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231503201 is about 15215.2292457261. The cubic root of 231503201 is about 614.0244528665.

Adding to 231503201 its reverse (102305132), we get a palindrome (333808333).

The spelling of 231503201 in words is "two hundred thirty-one million, five hundred three thousand, two hundred one".