50112721 has 2 divisors, whose sum is σ = 50112722. Its totient is φ = 50112720.

The previous prime is 50112703. The next prime is 50112773. The reversal of 50112721 is 12721105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44036496 + 6076225 = 6636^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 50112721 - 2⁷ = 50112593 is a prime.

It is a super-2 number, since 2×50112721² = 5022569612047682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25056360 + 25056361.

It is an arithmetic number, because the mean of its divisors is an integer number (25056361).

Almost surely, 2^50112721 is an apocalyptic number.

It is an amenable number.

50112721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50112721 is an equidigital number, since it uses as much as digits as its factorization.

50112721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 50112721 is about 7079.0339030125. The cubic root of 50112721 is about 368.6797872255.

Adding to 50112721 its reverse (12721105), we get a palindrome (62833826).

The spelling of 50112721 in words is "fifty million, one hundred twelve thousand, seven hundred twenty-one".