321234431 has 36 divisors (see below), whose sum is σ = 409386096. Its totient is φ = 246055680.

The previous prime is 321234427. The next prime is 321234497. The reversal of 321234431 is 134432123.

It is not a de Polignac number, because 321234431 - 2² = 321234427 is a prime.

It is a super-2 number, since 2×321234431² = 206383119319787522, which contains 22 as substring.

Its product of digits (1728) is a multiple of the sum of its prime divisors (108).

It is a junction number, because it is equal to n+sod(n) for n = 321234397 and 321234406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321230431) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6061001 + ... + 6061053.

It is an arithmetic number, because the mean of its divisors is an integer number (11371836).

Almost surely, 2^321234431 is an apocalyptic number.

321234431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

321234431 is a deficient number, since it is larger than the sum of its proper divisors (88151665).

321234431 is an equidigital number, since it uses as much as digits as its factorization.

321234431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 108 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 321234431 is about 17923.0140043465. The cubic root of 321234431 is about 684.8687698598.

Adding to 321234431 its reverse (134432123), we get a palindrome (455666554).

The spelling of 321234431 in words is "three hundred twenty-one million, two hundred thirty-four thousand, four hundred thirty-one".