231430401 has 48 divisors (see below), whose sum is σ = 364382928. Its totient is φ = 141004800.

The previous prime is 231430399. The next prime is 231430417. The reversal of 231430401 is 104034132.

231430401 is a `hidden beast` number, since 231 + 4 + 30 + 401 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 43877376 + 187553025 = 6624^2 + 13695^2 .

It is not a de Polignac number, because 231430401 - 2¹ = 231430399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231430471) 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 47 ways as a sum of consecutive naturals, for example, 1278531 + ... + 1278711.

It is an arithmetic number, because the mean of its divisors is an integer number (7591311).

Almost surely, 2^231430401 is an apocalyptic number.

It is an amenable number.

231430401 is a deficient number, since it is larger than the sum of its proper divisors (132952527).

231430401 is a wasteful number, since it uses less digits than its factorization.

231430401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 399 counting only the distinct ones).

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

The square root of 231430401 is about 15212.8367177197. The cubic root of 231430401 is about 613.9600827463.

Adding to 231430401 its reverse (104034132), we get a palindrome (335464533).

The spelling of 231430401 in words is "two hundred thirty-one million, four hundred thirty thousand, four hundred one".