51227160217 has 2 divisors, whose sum is σ = 51227160218. Its totient is φ = 51227160216.

The previous prime is 51227160211. The next prime is 51227160323. The reversal of 51227160217 is 71206172215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36612526336 + 14614633881 = 191344^2 + 120891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51227160217 is a prime.

It is not a weakly prime, because it can be changed into another prime (51227160211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613580108 + 25613580109.

It is an arithmetic number, because the mean of its divisors is an integer number (25613580109).

Almost surely, 2^51227160217 is an apocalyptic number.

It is an amenable number.

51227160217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51227160217 is an equidigital number, since it uses as much as digits as its factorization.

51227160217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 51227160217 in words is "fifty-one billion, two hundred twenty-seven million, one hundred sixty thousand, two hundred seventeen".