503220144 has 80 divisors (see below), whose sum is σ = 1499689728. Its totient is φ = 142423296.

The previous prime is 503220121. The next prime is 503220163. The reversal of 503220144 is 441022305.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 503220144.

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, 28954 + ... + 42950.

Almost surely, 2^503220144 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 503220144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749844864).

503220144 is an abundant number, since it is smaller than the sum of its proper divisors (996469584).

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

503220144 is a wasteful number, since it uses less digits than its factorization.

503220144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14122 (or 14116 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 503220144 is about 22432.5688230305. The cubic root of 503220144 is about 795.4007678331.

Adding to 503220144 its reverse (441022305), we get a palindrome (944242449).

The spelling of 503220144 in words is "five hundred three million, two hundred twenty thousand, one hundred forty-four".