42961843213 has 2 divisors, whose sum is σ = 42961843214. Its totient is φ = 42961843212.

The previous prime is 42961843187. The next prime is 42961843271. The reversal of 42961843213 is 31234816924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40869878569 + 2091964644 = 202163^2 + 45738^2 .

It is a cyclic number.

It is not a de Polignac number, because 42961843213 - 2⁹ = 42961842701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42961843213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42961843283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21480921606 + 21480921607.

It is an arithmetic number, because the mean of its divisors is an integer number (21480921607).

Almost surely, 2^42961843213 is an apocalyptic number.

It is an amenable number.

42961843213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42961843213 is an equidigital number, since it uses as much as digits as its factorization.

42961843213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The spelling of 42961843213 in words is "forty-two billion, nine hundred sixty-one million, eight hundred forty-three thousand, two hundred thirteen".