51665226359 has 2 divisors, whose sum is σ = 51665226360. Its totient is φ = 51665226358.

The previous prime is 51665226281. The next prime is 51665226397. The reversal of 51665226359 is 95362256615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51665226359 - 2⁸ = 51665226103 is a prime.

It is a super-2 number, since 2×51665226359² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51665228359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25832613179 + 25832613180.

It is an arithmetic number, because the mean of its divisors is an integer number (25832613180).

Almost surely, 2^51665226359 is an apocalyptic number.

51665226359 is a deficient number, since it is larger than the sum of its proper divisors (1).

51665226359 is an equidigital number, since it uses as much as digits as its factorization.

51665226359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 50.

The spelling of 51665226359 in words is "fifty-one billion, six hundred sixty-five million, two hundred twenty-six thousand, three hundred fifty-nine".