143113221 has 12 divisors (see below), whose sum is σ = 207217920. Its totient is φ = 95178600.

The previous prime is 143113183. The next prime is 143113241. The reversal of 143113221 is 122311341.

143113221 is a `hidden beast` number, since 1 + 431 + 13 + 221 = 666.

It is not a de Polignac number, because 143113221 - 2⁷ = 143113093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143113194 and 143113203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143113241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15205 + ... + 22746.

It is an arithmetic number, because the mean of its divisors is an integer number (17268160).

Almost surely, 2^143113221 is an apocalyptic number.

It is an amenable number.

143113221 is a deficient number, since it is larger than the sum of its proper divisors (64104699).

143113221 is a wasteful number, since it uses less digits than its factorization.

143113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38376 (or 38373 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 143113221 is about 11962.9938142590. The cubic root of 143113221 is about 523.0701281928.

Adding to 143113221 its reverse (122311341), we get a palindrome (265424562).

The spelling of 143113221 in words is "one hundred forty-three million, one hundred thirteen thousand, two hundred twenty-one".