50557220 has 72 divisors (see below), whose sum is σ = 128931264. Its totient is φ = 16572864.

The previous prime is 50557181. The next prime is 50557229. The reversal of 50557220 is 2275505.

It is a self number, because there is not a number n which added to its sum of digits gives 50557220.

It is not an unprimeable number, because it can be changed into a prime (50557229) 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, 21419 + ... + 23661.

It is an arithmetic number, because the mean of its divisors is an integer number (1790712).

Almost surely, 2^50557220 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 50557220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64465632).

50557220 is an abundant number, since it is smaller than the sum of its proper divisors (78374044).

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

50557220 is a wasteful number, since it uses less digits than its factorization.

50557220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 50557220 is about 7110.3600471425. The cubic root of 50557220 is about 369.7666412618.

The spelling of 50557220 in words is "fifty million, five hundred fifty-seven thousand, two hundred twenty".