321430002143 has 4 divisors (see below), whose sum is σ = 323287979208. Its totient is φ = 319572025080.

The previous prime is 321430002137. The next prime is 321430002151. The reversal of 321430002143 is 341200034123.

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

It is a cyclic number.

It is not a de Polignac number, because 321430002143 - 2⁶ = 321430002079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321430002163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928988273 + ... + 928988618.

It is an arithmetic number, because the mean of its divisors is an integer number (80821994802).

Almost surely, 2^321430002143 is an apocalyptic number.

321430002143 is a deficient number, since it is larger than the sum of its proper divisors (1857977065).

321430002143 is a wasteful number, since it uses less digits than its factorization.

321430002143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857977064.

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

Adding to 321430002143 its reverse (341200034123), we get a palindrome (662630036266).

The spelling of 321430002143 in words is "three hundred twenty-one billion, four hundred thirty million, two thousand, one hundred forty-three".