50371721 has 2 divisors, whose sum is σ = 50371722. Its totient is φ = 50371720.

The previous prime is 50371693. The next prime is 50371729. The reversal of 50371721 is 12717305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 1860496 = 6965^2 + 1364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50371721 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 (50371729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25185860 + 25185861.

It is an arithmetic number, because the mean of its divisors is an integer number (25185861).

Almost surely, 2^50371721 is an apocalyptic number.

It is an amenable number.

50371721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50371721 is an equidigital number, since it uses as much as digits as its factorization.

50371721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 50371721 is about 7097.3037838323. The cubic root of 50371721 is about 369.3138513149.

The spelling of 50371721 in words is "fifty million, three hundred seventy-one thousand, seven hundred twenty-one".