143031220 has 12 divisors (see below), whose sum is σ = 300365604. Its totient is φ = 57212480.

The previous prime is 143031211. The next prime is 143031257. The reversal of 143031220 is 22130341.

It is a happy number.

143031220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 79637776 + 63393444 = 8924^2 + 7962^2 .

It is a junction number, because it is equal to n+sod(n) for n = 143031194 and 143031203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3575761 + ... + 3575800.

It is an arithmetic number, because the mean of its divisors is an integer number (25030467).

Almost surely, 2^143031220 is an apocalyptic number.

143031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143031220 is an abundant number, since it is smaller than the sum of its proper divisors (157334384).

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

143031220 is a wasteful number, since it uses less digits than its factorization.

143031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7151570 (or 7151568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 143031220 is about 11959.5660456389. The cubic root of 143031220 is about 522.9702062149.

Adding to 143031220 its reverse (22130341), we get a palindrome (165161561).

The spelling of 143031220 in words is "one hundred forty-three million, thirty-one thousand, two hundred twenty".