1304432231 has 4 divisors (see below), whose sum is σ = 1307262264. Its totient is φ = 1301602200.

The previous prime is 1304432201. The next prime is 1304432263. The reversal of 1304432231 is 1322344031.

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-1304432231 is a prime.

It is a super-2 number, since 2×1304432231² = 3403086890543274722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304432197 and 1304432206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304432201) 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, 1414325 + ... + 1415246.

It is an arithmetic number, because the mean of its divisors is an integer number (326815566).

Almost surely, 2^1304432231 is an apocalyptic number.

1304432231 is a deficient number, since it is larger than the sum of its proper divisors (2830033).

1304432231 is an equidigital number, since it uses as much as digits as its factorization.

1304432231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830032.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1304432231 is about 36116.9244399354. The cubic root of 1304432231 is about 1092.6318108326.

Adding to 1304432231 its reverse (1322344031), we get a palindrome (2626776262).

The spelling of 1304432231 in words is "one billion, three hundred four million, four hundred thirty-two thousand, two hundred thirty-one".