143223561 has 12 divisors (see below), whose sum is σ = 222792388. Its totient is φ = 88137504.

The previous prime is 143223557. The next prime is 143223629. The reversal of 143223561 is 165322341.

It can be written as a sum of positive squares in 2 ways, for example, as 49617936 + 93605625 = 7044^2 + 9675^2 .

It is not a de Polignac number, because 143223561 - 2² = 143223557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143223541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611950 + ... + 612183.

Almost surely, 2^143223561 is an apocalyptic number.

It is an amenable number.

143223561 is a deficient number, since it is larger than the sum of its proper divisors (79568827).

143223561 is a wasteful number, since it uses less digits than its factorization.

143223561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224152 (or 1224149 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 143223561 is about 11967.6046475475. The cubic root of 143223561 is about 523.2045223250.

The spelling of 143223561 in words is "one hundred forty-three million, two hundred twenty-three thousand, five hundred sixty-one".