143571481 has 2 divisors, whose sum is σ = 143571482. Its totient is φ = 143571480.

The previous prime is 143571473. The next prime is 143571529. The reversal of 143571481 is 184175341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137241225 + 6330256 = 11715^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 143571481 - 2³ = 143571473 is a prime.

It is a super-2 number, since 2×143571481² = 41225540313066722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143511481) 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, 71785740 + 71785741.

It is an arithmetic number, because the mean of its divisors is an integer number (71785741).

Almost surely, 2^143571481 is an apocalyptic number.

It is an amenable number.

143571481 is a deficient number, since it is larger than the sum of its proper divisors (1).

143571481 is an equidigital number, since it uses as much as digits as its factorization.

143571481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 143571481 is about 11982.1317385514. The cubic root of 143571481 is about 523.6278374922.

The spelling of 143571481 in words is "one hundred forty-three million, five hundred seventy-one thousand, four hundred eighty-one".