321324131 has 4 divisors (see below), whose sum is σ = 321424152. Its totient is φ = 321224112.

The previous prime is 321324121. The next prime is 321324137. The reversal of 321324131 is 131423123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321324131 is a prime.

It is a super-2 number, since 2×321324131² = 206498394325810322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321324137) 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, 45026 + ... + 51671.

It is an arithmetic number, because the mean of its divisors is an integer number (80356038).

Almost surely, 2^321324131 is an apocalyptic number.

321324131 is a deficient number, since it is larger than the sum of its proper divisors (100021).

321324131 is an equidigital number, since it uses as much as digits as its factorization.

321324131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100020.

The product of its digits is 432, while the sum is 20.

The square root of 321324131 is about 17925.5161989829. The cubic root of 321324131 is about 684.9325104446.

Adding to 321324131 its reverse (131423123), we get a palindrome (452747254).

It can be divided in two parts, 32132 and 4131, that added together give a palindrome (36263).

The spelling of 321324131 in words is "three hundred twenty-one million, three hundred twenty-four thousand, one hundred thirty-one".