143133521 has 2 divisors, whose sum is σ = 143133522. Its totient is φ = 143133520.

The previous prime is 143133467. The next prime is 143133527. The reversal of 143133521 is 125331341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106832896 + 36300625 = 10336^2 + 6025^2 .

It is an emirp because it is prime and its reverse (125331341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143133521 - 2²⁶ = 76024657 is a prime.

It is not a weakly prime, because it can be changed into another prime (143133527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71566760 + 71566761.

It is an arithmetic number, because the mean of its divisors is an integer number (71566761).

Almost surely, 2^143133521 is an apocalyptic number.

It is an amenable number.

143133521 is a deficient number, since it is larger than the sum of its proper divisors (1).

143133521 is an equidigital number, since it uses as much as digits as its factorization.

143133521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 143133521 is about 11963.8422339982. The cubic root of 143133521 is about 523.0948587791.

Adding to 143133521 its reverse (125331341), we get a palindrome (268464862).

The spelling of 143133521 in words is "one hundred forty-three million, one hundred thirty-three thousand, five hundred twenty-one".