331421 has 4 divisors (see below), whose sum is σ = 342144. Its totient is φ = 320700.

The previous prime is 331399. The next prime is 331423. The reversal of 331421 is 124133.

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 331421 - 2¹⁴ = 315037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 331396 and 331405.

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 331421.

It is not an unprimeable number, because it can be changed into a prime (331423) 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, 5315 + ... + 5376.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2³³¹⁴²¹ is an apocalyptic number.

331421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

331421 is a deficient number, since it is larger than the sum of its proper divisors (10723).

331421 is a wasteful number, since it uses less digits than its factorization.

331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722.

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

The square root of 331421 is about 575.6917578010. The cubic root of 331421 is about 69.2032792726.

Adding to 331421 its reverse (124133), we get a palindrome (455554).

The spelling of 331421 in words is "three hundred thirty-one thousand, four hundred twenty-one".