51020521133 has 2 divisors, whose sum is σ = 51020521134. Its totient is φ = 51020521132.

The previous prime is 51020521127. The next prime is 51020521217. The reversal of 51020521133 is 33112502015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31654458889 + 19366062244 = 177917^2 + 139162^2 .

It is a cyclic number.

It is not a de Polignac number, because 51020521133 - 2⁴ = 51020521117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51020521099 and 51020521108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51020521033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510260566 + 25510260567.

It is an arithmetic number, because the mean of its divisors is an integer number (25510260567).

Almost surely, 2^51020521133 is an apocalyptic number.

It is an amenable number.

51020521133 is a deficient number, since it is larger than the sum of its proper divisors (1).

51020521133 is an equidigital number, since it uses as much as digits as its factorization.

51020521133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 51020521133 in words is "fifty-one billion, twenty million, five hundred twenty-one thousand, one hundred thirty-three".