143622221 has 8 divisors (see below), whose sum is σ = 147284088. Its totient is φ = 139968000.

The previous prime is 143622211. The next prime is 143622229. The reversal of 143622221 is 122226341.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13912900 + 129709321 = 3730^2 + 11389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143622221 - 2¹⁰ = 143621197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143622229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65381 + ... + 67541.

It is an arithmetic number, because the mean of its divisors is an integer number (18410511).

Almost surely, 2^143622221 is an apocalyptic number.

It is an amenable number.

143622221 is a deficient number, since it is larger than the sum of its proper divisors (3661867).

143622221 is a wasteful number, since it uses less digits than its factorization.

143622221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823.

The product of its digits is 1152, while the sum is 23.

The square root of 143622221 is about 11984.2488709139. The cubic root of 143622221 is about 523.6895158213.

Adding to 143622221 its reverse (122226341), we get a palindrome (265848562).

The spelling of 143622221 in words is "one hundred forty-three million, six hundred twenty-two thousand, two hundred twenty-one".