50157521 has 2 divisors, whose sum is σ = 50157522. Its totient is φ = 50157520.

The previous prime is 50157517. The next prime is 50157529. The reversal of 50157521 is 12575105.

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., 46771921 + 3385600 = 6839^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 50157521 - 2² = 50157517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (50157529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25078760 + 25078761.

It is an arithmetic number, because the mean of its divisors is an integer number (25078761).

Almost surely, 2^50157521 is an apocalyptic number.

It is an amenable number.

50157521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50157521 is an equidigital number, since it uses as much as digits as its factorization.

50157521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 50157521 is about 7082.1974697123. The cubic root of 50157521 is about 368.7896191846.

The spelling of 50157521 in words is "fifty million, one hundred fifty-seven thousand, five hundred twenty-one".