50721220 has 24 divisors (see below), whose sum is σ = 116198208. Its totient is φ = 18444000.

The previous prime is 50721197. The next prime is 50721221. The reversal of 50721220 is 2212705.

It is not an unprimeable number, because it can be changed into a prime (50721221) 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, 115056 + ... + 115495.

It is an arithmetic number, because the mean of its divisors is an integer number (4841592).

Almost surely, 2^50721220 is an apocalyptic number.

It is an amenable number.

50721220 is an abundant number, since it is smaller than the sum of its proper divisors (65476988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50721220 is a wasteful number, since it uses less digits than its factorization.

50721220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230571 (or 230569 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 50721220 is about 7121.8831779242. The cubic root of 50721220 is about 370.1660321315.

Adding to 50721220 its reverse (2212705), we get a palindrome (52933925).

The spelling of 50721220 in words is "fifty million, seven hundred twenty-one thousand, two hundred twenty".