50221440 has 96 divisors (see below), whose sum is σ = 173440800. Its totient is φ = 13390848.

The previous prime is 50221439. The next prime is 50221453. The reversal of 50221440 is 4412205.

50221440 is a `hidden beast` number, since 5 + 0 + 221 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1401 + ... + 10119.

It is an arithmetic number, because the mean of its divisors is an integer number (1806675).

Almost surely, 2^50221440 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 50221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86720400).

50221440 is an abundant number, since it is smaller than the sum of its proper divisors (123219360).

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

50221440 is a wasteful number, since it uses less digits than its factorization.

50221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8744 (or 8729 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 50221440 is about 7086.7086859839. The cubic root of 50221440 is about 368.9462102394.

Adding to 50221440 its reverse (4412205), we get a palindrome (54633645).

The spelling of 50221440 in words is "fifty million, two hundred twenty-one thousand, four hundred forty".