213957011917049 has 2 divisors, whose sum is σ = 213957011917050. Its totient is φ = 213957011917048.

The previous prime is 213957011917039. The next prime is 213957011917057. The reversal of 213957011917049 is 940719110759312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193235215422649 + 20721796494400 = 13900907^2 + 4552120^2 .

It is a cyclic number.

It is not a de Polignac number, because 213957011917049 - 2³² = 213952716949753 is a prime.

It is not a weakly prime, because it can be changed into another prime (213957011917039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106978505958524 + 106978505958525.

It is an arithmetic number, because the mean of its divisors is an integer number (106978505958525).

Almost surely, 2^{213957011917049} is an apocalyptic number.

It is an amenable number.

213957011917049 is a deficient number, since it is larger than the sum of its proper divisors (1).

213957011917049 is an equidigital number, since it uses as much as digits as its factorization.

213957011917049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4286520, while the sum is 59.

The spelling of 213957011917049 in words is "two hundred thirteen trillion, nine hundred fifty-seven billion, eleven million, nine hundred seventeen thousand, forty-nine".