50515721 has 8 divisors (see below), whose sum is σ = 53744544. Its totient is φ = 47315520.

The previous prime is 50515697. The next prime is 50515739. The reversal of 50515721 is 12751505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50515721 - 2⁶ = 50515657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50515121) 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 in 7 ways as a sum of consecutive naturals, for example, 3455 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (6718068).

Almost surely, 2^50515721 is an apocalyptic number.

It is an amenable number.

50515721 is a deficient number, since it is larger than the sum of its proper divisors (3228823).

50515721 is a wasteful number, since it uses less digits than its factorization.

50515721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14311.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 50515721 is about 7107.4412414033. The cubic root of 50515721 is about 369.6654414311.

The spelling of 50515721 in words is "fifty million, five hundred fifteen thousand, seven hundred twenty-one".