143552021 has 2 divisors, whose sum is σ = 143552022. Its totient is φ = 143552020.

The previous prime is 143551997. The next prime is 143552077. The reversal of 143552021 is 120255341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 22221796 = 11015^2 + 4714^2 .

It is an emirp because it is prime and its reverse (120255341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143552021 - 2²² = 139357717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143552081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71776010 + 71776011.

It is an arithmetic number, because the mean of its divisors is an integer number (71776011).

Almost surely, 2^143552021 is an apocalyptic number.

It is an amenable number.

143552021 is a deficient number, since it is larger than the sum of its proper divisors (1).

143552021 is an equidigital number, since it uses as much as digits as its factorization.

143552021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 143552021 is about 11981.3196685507. The cubic root of 143552021 is about 523.6041785268.

The spelling of 143552021 in words is "one hundred forty-three million, five hundred fifty-two thousand, twenty-one".