143731613361821 has 2 divisors, whose sum is σ = 143731613361822. Its totient is φ = 143731613361820.

The previous prime is 143731613361799. The next prime is 143731613361859. The reversal of 143731613361821 is 128163316137341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142574943225625 + 1156670136196 = 11940475^2 + 1075486^2 .

It is a cyclic number.

It is not a de Polignac number, because 143731613361821 - 2⁶ = 143731613361757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143731613361821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143731613361871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71865806680910 + 71865806680911.

It is an arithmetic number, because the mean of its divisors is an integer number (71865806680911).

Almost surely, 2^{143731613361821} is an apocalyptic number.

It is an amenable number.

143731613361821 is a deficient number, since it is larger than the sum of its proper divisors (1).

143731613361821 is an equidigital number, since it uses as much as digits as its factorization.

143731613361821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The spelling of 143731613361821 in words is "one hundred forty-three trillion, seven hundred thirty-one billion, six hundred thirteen million, three hundred sixty-one thousand, eight hundred twenty-one".