403431 has 8 divisors (see below), whose sum is σ = 614784. Its totient is φ = 230520.

The previous prime is 403391. The next prime is 403433. The reversal of 403431 is 134304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 403431 - 2¹⁴ = 387047 is a prime.

It is a super-2 number, since 2×403431² = 325513143522, which contains 22 as substring.

403431 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 403431.

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 403431.

It is not an unprimeable number, because it can be changed into a prime (403433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9585 + ... + 9626.

It is an arithmetic number, because the mean of its divisors is an integer number (76848).

2⁴⁰³⁴³¹ is an apocalyptic number.

403431 is a deficient number, since it is larger than the sum of its proper divisors (211353).

403431 is a wasteful number, since it uses less digits than its factorization.

403431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19221.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 403431 is about 635.1621840129. The cubic root of 403431 is about 73.8906957010.

Adding to 403431 its reverse (134304), we get a palindrome (537735).

The spelling of 403431 in words is "four hundred three thousand, four hundred thirty-one".