143345321 has 4 divisors (see below), whose sum is σ = 163823232. Its totient is φ = 122867412.

The previous prime is 143345317. The next prime is 143345341. The reversal of 143345321 is 123543341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123543341 = 1973 ⋅62617.

It is a cyclic number.

It is not a de Polignac number, because 143345321 - 2² = 143345317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143345311) 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, 10238945 + ... + 10238958.

It is an arithmetic number, because the mean of its divisors is an integer number (40955808).

Almost surely, 2^143345321 is an apocalyptic number.

It is an amenable number.

143345321 is a deficient number, since it is larger than the sum of its proper divisors (20477911).

143345321 is an equidigital number, since it uses as much as digits as its factorization.

143345321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20477910.

The product of its digits is 4320, while the sum is 26.

The square root of 143345321 is about 11972.6906332704. The cubic root of 143345321 is about 523.3527459318.

Adding to 143345321 its reverse (123543341), we get a palindrome (266888662).

The spelling of 143345321 in words is "one hundred forty-three million, three hundred forty-five thousand, three hundred twenty-one".