321431 has 4 divisors (see below), whose sum is σ = 350664. Its totient is φ = 292200.

The previous prime is 321427. The next prime is 321443. The reversal of 321431 is 134123.

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

It is a cyclic number.

It is not a de Polignac number, because 321431 - 2² = 321427 is a prime.

It is a super-2 number, since 2×321431² = 206635775522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321431.

It is not an unprimeable number, because it can be changed into a prime (321031) 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, 14600 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (87666).

2³²¹⁴³¹ is an apocalyptic number.

321431 is a deficient number, since it is larger than the sum of its proper divisors (29233).

321431 is a wasteful number, since it uses less digits than its factorization.

321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29232.

The product of its digits is 72, while the sum is 14.

The square root of 321431 is about 566.9488513085. The cubic root of 321431 is about 68.5008435792.

Adding to 321431 its reverse (134123), we get a palindrome (455554).

The spelling of 321431 in words is "three hundred twenty-one thousand, four hundred thirty-one".