143247025561 has 2 divisors, whose sum is σ = 143247025562. Its totient is φ = 143247025560.

The previous prime is 143247025543. The next prime is 143247025573. The reversal of 143247025561 is 165520742341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127623275536 + 15623750025 = 357244^2 + 124995^2 .

It is a cyclic number.

It is not a de Polignac number, because 143247025561 - 2¹³ = 143247017369 is a prime.

It is not a weakly prime, because it can be changed into another prime (143247025511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71623512780 + 71623512781.

It is an arithmetic number, because the mean of its divisors is an integer number (71623512781).

Almost surely, 2^143247025561 is an apocalyptic number.

It is an amenable number.

143247025561 is a deficient number, since it is larger than the sum of its proper divisors (1).

143247025561 is an equidigital number, since it uses as much as digits as its factorization.

143247025561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 143247025561 in words is "one hundred forty-three billion, two hundred forty-seven million, twenty-five thousand, five hundred sixty-one".