51521550029 has 2 divisors, whose sum is σ = 51521550030. Its totient is φ = 51521550028.

The previous prime is 51521550019. The next prime is 51521550037. The reversal of 51521550029 is 92005512515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43112293225 + 8409256804 = 207635^2 + 91702^2 .

It is a cyclic number.

It is not a de Polignac number, because 51521550029 - 2²⁰ = 51520501453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51521550019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760775014 + 25760775015.

It is an arithmetic number, because the mean of its divisors is an integer number (25760775015).

Almost surely, 2^51521550029 is an apocalyptic number.

It is an amenable number.

51521550029 is a deficient number, since it is larger than the sum of its proper divisors (1).

51521550029 is an equidigital number, since it uses as much as digits as its factorization.

51521550029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51521550029 in words is "fifty-one billion, five hundred twenty-one million, five hundred fifty thousand, twenty-nine".