321403431 has 8 divisors (see below), whose sum is σ = 428627584. Its totient is φ = 214224120.

The previous prime is 321403417. The next prime is 321403441. The reversal of 321403431 is 134304123.

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

It is not a de Polignac number, because 321403431 - 2⁵ = 321403399 is a prime.

It is a super-2 number, since 2×321403431² = 206600330917143522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321403398 and 321403407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321403441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12966 + ... + 28476.

It is an arithmetic number, because the mean of its divisors is an integer number (53578448).

Almost surely, 2^321403431 is an apocalyptic number.

321403431 is a deficient number, since it is larger than the sum of its proper divisors (107224153).

321403431 is a wasteful number, since it uses less digits than its factorization.

321403431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22421.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 321403431 is about 17927.7279932511. The cubic root of 321403431 is about 684.9888509383.

Adding to 321403431 its reverse (134304123), we get a palindrome (455707554).

The spelling of 321403431 in words is "three hundred twenty-one million, four hundred three thousand, four hundred thirty-one".