51145017227 has 2 divisors, whose sum is σ = 51145017228. Its totient is φ = 51145017226.

The previous prime is 51145017221. The next prime is 51145017257. The reversal of 51145017227 is 72271054115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51145017227 - 2⁸ = 51145016971 is a prime.

It is not a weakly prime, because it can be changed into another prime (51145017221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25572508613 + 25572508614.

It is an arithmetic number, because the mean of its divisors is an integer number (25572508614).

Almost surely, 2^51145017227 is an apocalyptic number.

51145017227 is a deficient number, since it is larger than the sum of its proper divisors (1).

51145017227 is an equidigital number, since it uses as much as digits as its factorization.

51145017227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 35.

The spelling of 51145017227 in words is "fifty-one billion, one hundred forty-five million, seventeen thousand, two hundred twenty-seven".