50572421 has 2 divisors, whose sum is σ = 50572422. Its totient is φ = 50572420.

The previous prime is 50572409. The next prime is 50572493. The reversal of 50572421 is 12427505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 21520321 = 5390^2 + 4639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50572421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50572321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25286210 + 25286211.

It is an arithmetic number, because the mean of its divisors is an integer number (25286211).

Almost surely, 2^50572421 is an apocalyptic number.

It is an amenable number.

50572421 is a deficient number, since it is larger than the sum of its proper divisors (1).

50572421 is an equidigital number, since it uses as much as digits as its factorization.

50572421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 50572421 is about 7111.4289000172. The cubic root of 50572421 is about 369.8036966977.

Adding to 50572421 its reverse (12427505), we get a palindrome (62999926).

The spelling of 50572421 in words is "fifty million, five hundred seventy-two thousand, four hundred twenty-one".