143221023 has 48 divisors (see below), whose sum is σ = 243210240. Its totient is φ = 80308800.

The previous prime is 143221021. The next prime is 143221027. The reversal of 143221023 is 320122341.

143221023 is a `hidden beast` number, since 1 + 432 + 210 + 23 = 666.

It is not a de Polignac number, because 143221023 - 2¹ = 143221021 is a prime.

It is a super-2 number, since 2×143221023² = 41024522858333058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143220987 and 143221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143221021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69573 + ... + 71601.

It is an arithmetic number, because the mean of its divisors is an integer number (5066880).

Almost surely, 2^143221023 is an apocalyptic number.

143221023 is a deficient number, since it is larger than the sum of its proper divisors (99989217).

143221023 is a wasteful number, since it uses less digits than its factorization.

143221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100 (or 2097 counting only the distinct ones).

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

The square root of 143221023 is about 11967.4986108209. The cubic root of 143221023 is about 523.2014318165.

Adding to 143221023 its reverse (320122341), we get a palindrome (463343364).

The spelling of 143221023 in words is "one hundred forty-three million, two hundred twenty-one thousand, twenty-three".