50721212 has 12 divisors (see below), whose sum is σ = 90437256. Its totient is φ = 24882000.

The previous prime is 50721197. The next prime is 50721221. The reversal of 50721212 is 21212705.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119414 + ... + 119837.

It is an arithmetic number, because the mean of its divisors is an integer number (7536438).

Almost surely, 2^50721212 is an apocalyptic number.

It is an amenable number.

50721212 is a deficient number, since it is larger than the sum of its proper divisors (39716044).

50721212 is a wasteful number, since it uses less digits than its factorization.

50721212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239308 (or 239306 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 50721212 is about 7121.8826162750. The cubic root of 50721212 is about 370.1660126701.

Adding to 50721212 its reverse (21212705), we get a palindrome (71933917).

The spelling of 50721212 in words is "fifty million, seven hundred twenty-one thousand, two hundred twelve".