143221963 has 4 divisors (see below), whose sum is σ = 144489528. Its totient is φ = 141954400.

The previous prime is 143221951. The next prime is 143222021. The reversal of 143221963 is 369122341.

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 143221963 - 2⁹ = 143221451 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143221913) 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, 633613 + ... + 633838.

It is an arithmetic number, because the mean of its divisors is an integer number (36122382).

Almost surely, 2^143221963 is an apocalyptic number.

143221963 is a deficient number, since it is larger than the sum of its proper divisors (1267565).

143221963 is a wasteful number, since it uses less digits than its factorization.

143221963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267564.

The product of its digits is 7776, while the sum is 31.

The square root of 143221963 is about 11967.5378837921. The cubic root of 143221963 is about 523.2025764536.

The spelling of 143221963 in words is "one hundred forty-three million, two hundred twenty-one thousand, nine hundred sixty-three".