143223021 has 6 divisors (see below), whose sum is σ = 206877710. Its totient is φ = 95482008.

The previous prime is 143222993. The next prime is 143223029. The reversal of 143223021 is 120322341.

143223021 is a `hidden beast` number, since 1 + 432 + 230 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 141276996 + 1946025 = 11886^2 + 1395^2 .

It is not a de Polignac number, because 143223021 - 2⁶ = 143222957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143222985 and 143223003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143223029) 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 5 ways as a sum of consecutive naturals, for example, 7956826 + ... + 7956843.

Almost surely, 2^143223021 is an apocalyptic number.

It is an amenable number.

143223021 is a deficient number, since it is larger than the sum of its proper divisors (63654689).

143223021 is a wasteful number, since it uses less digits than its factorization.

143223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913675 (or 15913672 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 143223021 is about 11967.5820866205. The cubic root of 143223021 is about 523.2038647731.

Adding to 143223021 its reverse (120322341), we get a palindrome (263545362).

The spelling of 143223021 in words is "one hundred forty-three million, two hundred twenty-three thousand, twenty-one".