321130431 has 24 divisors (see below), whose sum is σ = 475151040. Its totient is φ = 208935936.

The previous prime is 321130421. The next prime is 321130441. The reversal of 321130431 is 134031123.

It is an interprime number because it is at equal distance from previous prime (321130421) and next prime (321130441).

It is not a de Polignac number, because 321130431 - 2¹¹ = 321128383 is a prime.

It is a super-2 number, since 2×321130431² = 206249507428491522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321130421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61210 + ... + 66248.

It is an arithmetic number, because the mean of its divisors is an integer number (19797960).

Almost surely, 2^321130431 is an apocalyptic number.

321130431 is a deficient number, since it is larger than the sum of its proper divisors (154020609).

321130431 is a wasteful number, since it uses less digits than its factorization.

321130431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215 (or 5212 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 321130431 is about 17920.1124717453. The cubic root of 321130431 is about 684.7948528767.

Adding to 321130431 its reverse (134031123), we get a palindrome (455161554).

The spelling of 321130431 in words is "three hundred twenty-one million, one hundred thirty thousand, four hundred thirty-one".