231130401 has 4 divisors (see below), whose sum is σ = 308173872. Its totient is φ = 154086932.

The previous prime is 231130397. The next prime is 231130423. The reversal of 231130401 is 104031132.

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 231130401 - 2² = 231130397 is a prime.

It is a super-3 number, since 3×231130401³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231130441) 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, 38521731 + ... + 38521736.

It is an arithmetic number, because the mean of its divisors is an integer number (77043468).

Almost surely, 2^231130401 is an apocalyptic number.

It is an amenable number.

231130401 is a deficient number, since it is larger than the sum of its proper divisors (77043471).

231130401 is an equidigital number, since it uses as much as digits as its factorization.

231130401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77043470.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231130401 is about 15202.9734262742. The cubic root of 231130401 is about 613.6946787369.

Adding to 231130401 its reverse (104031132), we get a palindrome (335161533).

The spelling of 231130401 in words is "two hundred thirty-one million, one hundred thirty thousand, four hundred one".