50537721 has 8 divisors (see below), whose sum is σ = 72567040. Its totient is φ = 31100112.

The previous prime is 50537717. The next prime is 50537731. The reversal of 50537721 is 12773505.

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

It is not a de Polignac number, because 50537721 - 2² = 50537717 is a prime.

It is a super-2 number, since 2×50537721² = 5108122487747682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50537731) 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, 647881 + ... + 647958.

It is an arithmetic number, because the mean of its divisors is an integer number (9070880).

Almost surely, 2^50537721 is an apocalyptic number.

It is an amenable number.

50537721 is a deficient number, since it is larger than the sum of its proper divisors (22029319).

50537721 is a wasteful number, since it uses less digits than its factorization.

50537721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295855.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 50537721 is about 7108.9887466503. The cubic root of 50537721 is about 369.7190977268.

It can be divided in two parts, 505 and 37721, that added together give a triangular number (38226 = T₂₇₆).

The spelling of 50537721 in words is "fifty million, five hundred thirty-seven thousand, seven hundred twenty-one".