321424143 has 16 divisors (see below), whose sum is σ = 440685696. Its totient is φ = 208236960.

The previous prime is 321424109. The next prime is 321424193. The reversal of 321424143 is 341424123.

It is not a de Polignac number, because 321424143 - 2⁶ = 321424079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321424193) 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 15 ways as a sum of consecutive naturals, for example, 142180 + ... + 144422.

It is an arithmetic number, because the mean of its divisors is an integer number (27542856).

Almost surely, 2^321424143 is an apocalyptic number.

321424143 is a deficient number, since it is larger than the sum of its proper divisors (119261553).

321424143 is a wasteful number, since it uses less digits than its factorization.

321424143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574.

The product of its digits is 2304, while the sum is 24.

The square root of 321424143 is about 17928.3056366183. The cubic root of 321424143 is about 685.0035647247.

Adding to 321424143 its reverse (341424123), we get a palindrome (662848266).

The spelling of 321424143 in words is "three hundred twenty-one million, four hundred twenty-four thousand, one hundred forty-three".