210139831441 has 2 divisors, whose sum is σ = 210139831442. Its totient is φ = 210139831440.

The previous prime is 210139831427. The next prime is 210139831483. The reversal of 210139831441 is 144138931012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199559651841 + 10580179600 = 446721^2 + 102860^2 .

It is a cyclic number.

It is not a de Polignac number, because 210139831441 - 2⁷ = 210139831313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210139831441.

It is not a weakly prime, because it can be changed into another prime (210139831141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105069915720 + 105069915721.

It is an arithmetic number, because the mean of its divisors is an integer number (105069915721).

Almost surely, 2^210139831441 is an apocalyptic number.

It is an amenable number.

210139831441 is a deficient number, since it is larger than the sum of its proper divisors (1).

210139831441 is an equidigital number, since it uses as much as digits as its factorization.

210139831441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 210139831441 in words is "two hundred ten billion, one hundred thirty-nine million, eight hundred thirty-one thousand, four hundred forty-one".