331431 has 4 divisors (see below), whose sum is σ = 441912. Its totient is φ = 220952.

The previous prime is 331423. The next prime is 331447. The reversal of 331431 is 134133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134133 = 3 ⋅44711.

It is a cyclic number.

It is not a de Polignac number, because 331431 - 2³ = 331423 is a prime.

It is a super-2 number, since 2×331431² = 219693015522, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 331431.

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 331431.

It is not an unprimeable number, because it can be changed into a prime (331451) 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, 55236 + ... + 55241.

It is an arithmetic number, because the mean of its divisors is an integer number (110478).

2³³¹⁴³¹ is an apocalyptic number.

331431 is a deficient number, since it is larger than the sum of its proper divisors (110481).

331431 is a wasteful number, since it uses less digits than its factorization.

331431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110480.

The product of its digits is 108, while the sum is 15.

The square root of 331431 is about 575.7004429389. The cubic root of 331431 is about 69.2039752915.

Adding to 331431 its reverse (134133), we get a palindrome (465564).

The spelling of 331431 in words is "three hundred thirty-one thousand, four hundred thirty-one".