212055427609 has 2 divisors, whose sum is σ = 212055427610. Its totient is φ = 212055427608.

The previous prime is 212055427579. The next prime is 212055427637. The reversal of 212055427609 is 906724550212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162951083584 + 49104344025 = 403672^2 + 221595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212055427609 is a prime.

It is not a weakly prime, because it can be changed into another prime (212055427699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106027713804 + 106027713805.

It is an arithmetic number, because the mean of its divisors is an integer number (106027713805).

Almost surely, 2^212055427609 is an apocalyptic number.

It is an amenable number.

212055427609 is a deficient number, since it is larger than the sum of its proper divisors (1).

212055427609 is an equidigital number, since it uses as much as digits as its factorization.

212055427609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 212055427609 in words is "two hundred twelve billion, fifty-five million, four hundred twenty-seven thousand, six hundred nine".