209212717151 has 2 divisors, whose sum is σ = 209212717152. Its totient is φ = 209212717150.

The previous prime is 209212717057. The next prime is 209212717169. The reversal of 209212717151 is 151717212902.

209212717151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209212717151 - 2³⁴ = 192032847967 is a prime.

It is a super-2 number, since 2×209212717151² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209212717751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104606358575 + 104606358576.

It is an arithmetic number, because the mean of its divisors is an integer number (104606358576).

Almost surely, 2^209212717151 is an apocalyptic number.

209212717151 is a deficient number, since it is larger than the sum of its proper divisors (1).

209212717151 is an equidigital number, since it uses as much as digits as its factorization.

209212717151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 38.

The spelling of 209212717151 in words is "two hundred nine billion, two hundred twelve million, seven hundred seventeen thousand, one hundred fifty-one".