143224020 has 72 divisors (see below), whose sum is σ = 442672776. Its totient is φ = 37469952.

The previous prime is 143224009. The next prime is 143224021. The reversal of 143224020 is 20422341.

It can be written as a sum of positive squares in 4 ways, for example, as 39917124 + 103306896 = 6318^2 + 10164^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 143223984 and 143224002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143224021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2034 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (6148233).

Almost surely, 2^143224020 is an apocalyptic number.

143224020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143224020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221336388).

143224020 is an abundant number, since it is smaller than the sum of its proper divisors (299448756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143224020 is a wasteful number, since it uses less digits than its factorization.

143224020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15081 (or 15076 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 143224020 is about 11967.6238243020. The cubic root of 143224020 is about 523.2050812429.

Adding to 143224020 its reverse (20422341), we get a palindrome (163646361).

It can be divided in two parts, 1432 and 24020, that added together give a palindrome (25452).

The spelling of 143224020 in words is "one hundred forty-three million, two hundred twenty-four thousand, twenty".