50207021 has 2 divisors, whose sum is σ = 50207022. Its totient is φ = 50207020.

The previous prime is 50207009. The next prime is 50207023. The reversal of 50207021 is 12070205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42445225 + 7761796 = 6515^2 + 2786^2 .

It is a cyclic number.

It is not a de Polignac number, because 50207021 - 2⁶ = 50206957 is a prime.

Together with 50207023, 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 (50207023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25103510 + 25103511.

It is an arithmetic number, because the mean of its divisors is an integer number (25103511).

Almost surely, 2^50207021 is an apocalyptic number.

It is an amenable number.

50207021 is a deficient number, since it is larger than the sum of its proper divisors (1).

50207021 is an equidigital number, since it uses as much as digits as its factorization.

50207021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 50207021 is about 7085.6912859650. The cubic root of 50207021 is about 368.9108976677.

Adding to 50207021 its reverse (12070205), we get a palindrome (62277226).

The spelling of 50207021 in words is "fifty million, two hundred seven thousand, twenty-one".