50135621 has 2 divisors, whose sum is σ = 50135622. Its totient is φ = 50135620.

The previous prime is 50135609. The next prime is 50135647. The reversal of 50135621 is 12653105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49350625 + 784996 = 7025^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 50135621 - 2⁶ = 50135557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50135651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25067810 + 25067811.

It is an arithmetic number, because the mean of its divisors is an integer number (25067811).

Almost surely, 2^50135621 is an apocalyptic number.

It is an amenable number.

50135621 is a deficient number, since it is larger than the sum of its proper divisors (1).

50135621 is an equidigital number, since it uses as much as digits as its factorization.

50135621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 50135621 is about 7080.6511706198. The cubic root of 50135621 is about 368.7359371827.

Adding to 50135621 its reverse (12653105), we get a palindrome (62788726).

The spelling of 50135621 in words is "fifty million, one hundred thirty-five thousand, six hundred twenty-one".