212237915781413 has 2 divisors, whose sum is σ = 212237915781414. Its totient is φ = 212237915781412.

The previous prime is 212237915781377. The next prime is 212237915781439. The reversal of 212237915781413 is 314187519732212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205262728422049 + 6975187359364 = 14326993^2 + 2641058^2 .

It is a cyclic number.

It is not a de Polignac number, because 212237915781413 - 2²⁸ = 212237647345957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212237915781313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106118957890706 + 106118957890707.

It is an arithmetic number, because the mean of its divisors is an integer number (106118957890707).

Almost surely, 2^{212237915781413} is an apocalyptic number.

It is an amenable number.

212237915781413 is a deficient number, since it is larger than the sum of its proper divisors (1).

212237915781413 is an equidigital number, since it uses as much as digits as its factorization.

212237915781413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 56.

The spelling of 212237915781413 in words is "two hundred twelve trillion, two hundred thirty-seven billion, nine hundred fifteen million, seven hundred eighty-one thousand, four hundred thirteen".