50511725021 has 2 divisors, whose sum is σ = 50511725022. Its totient is φ = 50511725020.

The previous prime is 50511724999. The next prime is 50511725023. The reversal of 50511725021 is 12052711505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34182463225 + 16329261796 = 184885^2 + 127786^2 .

It is a cyclic number.

It is not a de Polignac number, because 50511725021 - 2⁶ = 50511724957 is a prime.

Together with 50511725023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50511725023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25255862510 + 25255862511.

It is an arithmetic number, because the mean of its divisors is an integer number (25255862511).

Almost surely, 2^50511725021 is an apocalyptic number.

It is an amenable number.

50511725021 is a deficient number, since it is larger than the sum of its proper divisors (1).

50511725021 is an equidigital number, since it uses as much as digits as its factorization.

50511725021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3500, while the sum is 29.

The spelling of 50511725021 in words is "fifty billion, five hundred eleven million, seven hundred twenty-five thousand, twenty-one".