50717561 has 2 divisors, whose sum is σ = 50717562. Its totient is φ = 50717560.

The previous prime is 50717551. The next prime is 50717573. The reversal of 50717561 is 16571705.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47183161 + 3534400 = 6869^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 50717561 - 2⁶ = 50717497 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (50717551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25358780 + 25358781.

It is an arithmetic number, because the mean of its divisors is an integer number (25358781).

Almost surely, 2^50717561 is an apocalyptic number.

It is an amenable number.

50717561 is a deficient number, since it is larger than the sum of its proper divisors (1).

50717561 is an equidigital number, since it uses as much as digits as its factorization.

50717561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 50717561 is about 7121.6262889876. The cubic root of 50717561 is about 370.1571307284.

The spelling of 50717561 in words is "fifty million, seven hundred seventeen thousand, five hundred sixty-one".