50011220 has 48 divisors (see below), whose sum is σ = 120667008. Its totient is φ = 17055360.

The previous prime is 50011217. The next prime is 50011231. The reversal of 50011220 is 2211005.

It is a super-2 number, since 2×50011220² = 5002244251776800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28694 + ... + 30386.

It is an arithmetic number, because the mean of its divisors is an integer number (2513896).

Almost surely, 2^50011220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60333504).

50011220 is an abundant number, since it is smaller than the sum of its proper divisors (70655788).

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

50011220 is a wasteful number, since it uses less digits than its factorization.

50011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 50011220 is about 7071.8611411707. The cubic root of 50011220 is about 368.4307043587.

Adding to 50011220 its reverse (2211005), we get a palindrome (52222225).

The spelling of 50011220 in words is "fifty million, eleven thousand, two hundred twenty".