51025206269 has 2 divisors, whose sum is σ = 51025206270. Its totient is φ = 51025206268.

The previous prime is 51025206263. The next prime is 51025206283. The reversal of 51025206269 is 96260252015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50357604025 + 667602244 = 224405^2 + 25838^2 .

It is a cyclic number.

It is not a de Polignac number, because 51025206269 - 2²⁴ = 51008429053 is a prime.

It is a super-2 number, since 2×51025206269² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51025206263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25512603134 + 25512603135.

It is an arithmetic number, because the mean of its divisors is an integer number (25512603135).

Almost surely, 2^51025206269 is an apocalyptic number.

It is an amenable number.

51025206269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51025206269 is an equidigital number, since it uses as much as digits as its factorization.

51025206269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 51025206269 in words is "fifty-one billion, twenty-five million, two hundred six thousand, two hundred sixty-nine".