50213721 has 8 divisors (see below), whose sum is σ = 67010944. Its totient is φ = 33446160.

The previous prime is 50213687. The next prime is 50213747. The reversal of 50213721 is 12731205.

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

It is not a de Polignac number, because 50213721 - 2⁷ = 50213593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50213791) 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, 3106 + ... + 10491.

It is an arithmetic number, because the mean of its divisors is an integer number (8376368).

Almost surely, 2^50213721 is an apocalyptic number.

It is an amenable number.

50213721 is a deficient number, since it is larger than the sum of its proper divisors (16797223).

50213721 is a wasteful number, since it uses less digits than its factorization.

50213721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14831.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 50213721 is about 7086.1640539858. The cubic root of 50213721 is about 368.9273070133.

Adding to 50213721 its reverse (12731205), we get a palindrome (62944926).

The spelling of 50213721 in words is "fifty million, two hundred thirteen thousand, seven hundred twenty-one".