143140221 has 72 divisors (see below), whose sum is σ = 259664184. Its totient is φ = 75479040.

The previous prime is 143140183. The next prime is 143140229. The reversal of 143140221 is 122041341.

It can be written as a sum of positive squares in 4 ways, for example, as 1863225 + 141276996 = 1365^2 + 11886^2 .

It is not a de Polignac number, because 143140221 - 2⁷ = 143140093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143140194 and 143140203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143140229) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 457161 + ... + 457473.

It is an arithmetic number, because the mean of its divisors is an integer number (3606447).

Almost surely, 2^143140221 is an apocalyptic number.

It is an amenable number.

143140221 is a deficient number, since it is larger than the sum of its proper divisors (116523963).

143140221 is a wasteful number, since it uses less digits than its factorization.

143140221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 143140221 is about 11964.1222411007. The cubic root of 143140221 is about 523.1030205776.

Adding to 143140221 its reverse (122041341), we get a palindrome (265181562).

The spelling of 143140221 in words is "one hundred forty-three million, one hundred forty thousand, two hundred twenty-one".