143131220 has 12 divisors (see below), whose sum is σ = 300575604. Its totient is φ = 57252480.

The previous prime is 143131189. The next prime is 143131249. The reversal of 143131220 is 22131341.

It can be written as a sum of positive squares in 2 ways, for example, as 17422276 + 125708944 = 4174^2 + 11212^2 .

It is a super-2 number, since 2×143131220² = 40973092277376800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3578261 + ... + 3578300.

It is an arithmetic number, because the mean of its divisors is an integer number (25047967).

Almost surely, 2^143131220 is an apocalyptic number.

143131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143131220 is an abundant number, since it is smaller than the sum of its proper divisors (157444384).

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

143131220 is a wasteful number, since it uses less digits than its factorization.

143131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156570 (or 7156568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 143131220 is about 11963.7460688532. The cubic root of 143131220 is about 523.0920556908.

Adding to 143131220 its reverse (22131341), we get a palindrome (165262561).

The spelling of 143131220 in words is "one hundred forty-three million, one hundred thirty-one thousand, two hundred twenty".