51454108217 has 2 divisors, whose sum is σ = 51454108218. Its totient is φ = 51454108216.

The previous prime is 51454108213. The next prime is 51454108219. The reversal of 51454108217 is 71280145415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31591152121 + 19862956096 = 177739^2 + 140936^2 .

It is a cyclic number.

It is not a de Polignac number, because 51454108217 - 2² = 51454108213 is a prime.

Together with 51454108219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51454108213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25727054108 + 25727054109.

It is an arithmetic number, because the mean of its divisors is an integer number (25727054109).

Almost surely, 2^51454108217 is an apocalyptic number.

It is an amenable number.

51454108217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51454108217 is an equidigital number, since it uses as much as digits as its factorization.

51454108217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 38.

The spelling of 51454108217 in words is "fifty-one billion, four hundred fifty-four million, one hundred eight thousand, two hundred seventeen".