212540412287893 has 2 divisors, whose sum is σ = 212540412287894. Its totient is φ = 212540412287892.

The previous prime is 212540412287881. The next prime is 212540412288007. The reversal of 212540412287893 is 398782214045212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166090285310404 + 46450126977489 = 12887602^2 + 6815433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212540412287893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212540412287803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106270206143946 + 106270206143947.

It is an arithmetic number, because the mean of its divisors is an integer number (106270206143947).

Almost surely, 2^{212540412287893} is an apocalyptic number.

It is an amenable number.

212540412287893 is a deficient number, since it is larger than the sum of its proper divisors (1).

212540412287893 is an equidigital number, since it uses as much as digits as its factorization.

212540412287893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 212540412287893 in words is "two hundred twelve trillion, five hundred forty billion, four hundred twelve million, two hundred eighty-seven thousand, eight hundred ninety-three".