1230431231 has 4 divisors (see below), whose sum is σ = 1233530952. Its totient is φ = 1227331512.

The previous prime is 1230431173. The next prime is 1230431233. The reversal of 1230431231 is 1321340321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230431231 is a prime.

It is a super-2 number, since 2×1230431231² = 3027922028440350722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230431233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549265 + ... + 1550058.

It is an arithmetic number, because the mean of its divisors is an integer number (308382738).

Almost surely, 2^1230431231 is an apocalyptic number.

1230431231 is a deficient number, since it is larger than the sum of its proper divisors (3099721).

1230431231 is an equidigital number, since it uses as much as digits as its factorization.

1230431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099720.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1230431231 is about 35077.5032036204. The cubic root of 1230431231 is about 1071.5664687977.

Adding to 1230431231 its reverse (1321340321), we get a palindrome (2551771552).

The spelling of 1230431231 in words is "one billion, two hundred thirty million, four hundred thirty-one thousand, two hundred thirty-one".