321330131 has 4 divisors (see below), whose sum is σ = 321399792. Its totient is φ = 321260472.

The previous prime is 321330083. The next prime is 321330143. The reversal of 321330131 is 131033123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131033123 = 13 ⋅10079471.

It is a cyclic number.

It is not a de Polignac number, because 321330131 - 2¹⁴ = 321313747 is a prime.

It is a super-2 number, since 2×321330131² = 206506106176954322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321330151) 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, 27380 + ... + 37313.

It is an arithmetic number, because the mean of its divisors is an integer number (80349948).

Almost surely, 2^321330131 is an apocalyptic number.

321330131 is a deficient number, since it is larger than the sum of its proper divisors (69661).

321330131 is an equidigital number, since it uses as much as digits as its factorization.

321330131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69660.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 321330131 is about 17925.6835573989. The cubic root of 321330131 is about 684.9367736056.

Adding to 321330131 its reverse (131033123), we get a palindrome (452363254).

The spelling of 321330131 in words is "three hundred twenty-one million, three hundred thirty thousand, one hundred thirty-one".