50000001521 has 2 divisors, whose sum is σ = 50000001522. Its totient is φ = 50000001520.

The previous prime is 50000001413. The next prime is 50000001533. The reversal of 50000001521 is 12510000005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49746841600 + 253159921 = 223040^2 + 15911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50000001521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50000001496 and 50000001505.

It is not a weakly prime, because it can be changed into another prime (50000061521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25000000760 + 25000000761.

It is an arithmetic number, because the mean of its divisors is an integer number (25000000761).

Almost surely, 2^50000001521 is an apocalyptic number.

It is an amenable number.

50000001521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50000001521 is an equidigital number, since it uses as much as digits as its factorization.

50000001521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50, while the sum is 14.

Adding to 50000001521 its reverse (12510000005), we get a palindrome (62510001526).

The spelling of 50000001521 in words is "fifty billion, one thousand, five hundred twenty-one".