50210721 has 24 divisors (see below), whose sum is σ = 79619904. Its totient is φ = 30238560.

The previous prime is 50210717. The next prime is 50210723. The reversal of 50210721 is 12701205.

It is not a de Polignac number, because 50210721 - 2² = 50210717 is a prime.

It is a super-2 number, since 2×50210721² = 5042233006679682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 50210694 and 50210703.

It is not an unprimeable number, because it can be changed into a prime (50210723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15015 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (3317496).

Almost surely, 2^50210721 is an apocalyptic number.

It is an amenable number.

50210721 is a deficient number, since it is larger than the sum of its proper divisors (29409183).

50210721 is a wasteful number, since it uses less digits than its factorization.

50210721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221 (or 3218 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 50210721 is about 7085.9523707121. The cubic root of 50210721 is about 368.9199597256.

Adding to 50210721 its reverse (12701205), we get a palindrome (62911926).

The spelling of 50210721 in words is "fifty million, two hundred ten thousand, seven hundred twenty-one".