50513721 has 8 divisors (see below), whose sum is σ = 67404480. Its totient is φ = 33649392.

The previous prime is 50513713. The next prime is 50513741. The reversal of 50513721 is 12731505.

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

It is not a de Polignac number, because 50513721 - 2³ = 50513713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50513691 and 50513700.

It is not an unprimeable number, because it can be changed into a prime (50513741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (8425560).

Almost surely, 2^50513721 is an apocalyptic number.

It is an amenable number.

50513721 is a deficient number, since it is larger than the sum of its proper divisors (16890759).

50513721 is a wasteful number, since it uses less digits than its factorization.

50513721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13215.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 50513721 is about 7107.3005424000. The cubic root of 50513721 is about 369.6605628137.

The spelling of 50513721 in words is "fifty million, five hundred thirteen thousand, seven hundred twenty-one".