321430131 has 12 divisors (see below), whose sum is σ = 506496120. Its totient is φ = 194806080.

The previous prime is 321430099. The next prime is 321430141. The reversal of 321430131 is 131034123.

It is not a de Polignac number, because 321430131 - 2⁵ = 321430099 is a prime.

It is a super-2 number, since 2×321430131² = 206634658229354322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321430141) 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 11 ways as a sum of consecutive naturals, for example, 1623286 + ... + 1623483.

It is an arithmetic number, because the mean of its divisors is an integer number (42208010).

Almost surely, 2^321430131 is an apocalyptic number.

321430131 is a deficient number, since it is larger than the sum of its proper divisors (185065989).

321430131 is a wasteful number, since it uses less digits than its factorization.

321430131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246786 (or 3246783 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 321430131 is about 17928.4726343322. The cubic root of 321430131 is about 685.0078184768.

Adding to 321430131 its reverse (131034123), we get a palindrome (452464254).

The spelling of 321430131 in words is "three hundred twenty-one million, four hundred thirty thousand, one hundred thirty-one".