50223721 has 2 divisors, whose sum is σ = 50223722. Its totient is φ = 50223720.

The previous prime is 50223709. The next prime is 50223749. The reversal of 50223721 is 12732205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26409321 + 23814400 = 5139^2 + 4880^2 .

It is a cyclic number.

It is not a de Polignac number, because 50223721 - 2⁹ = 50223209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50223692 and 50223701.

It is not a weakly prime, because it can be changed into another prime (50227721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25111860 + 25111861.

It is an arithmetic number, because the mean of its divisors is an integer number (25111861).

Almost surely, 2^50223721 is an apocalyptic number.

It is an amenable number.

50223721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50223721 is an equidigital number, since it uses as much as digits as its factorization.

50223721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 50223721 is about 7086.8696192325. The cubic root of 50223721 is about 368.9517958589.

Adding to 50223721 its reverse (12732205), we get a palindrome (62955926).

The spelling of 50223721 in words is "fifty million, two hundred twenty-three thousand, seven hundred twenty-one".