504221540 has 24 divisors (see below), whose sum is σ = 1059616320. Its totient is φ = 201545568.

The previous prime is 504221539. The next prime is 504221587. The reversal of 504221540 is 45122405.

It is a happy number.

It is a super-2 number, since 2×504221540² = 508478722799943200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22691 + ... + 39029.

It is an arithmetic number, because the mean of its divisors is an integer number (44150680).

Almost surely, 2^504221540 is an apocalyptic number.

It is an amenable number.

504221540 is an abundant number, since it is smaller than the sum of its proper divisors (555394780).

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

504221540 is a wasteful number, since it uses less digits than its factorization.

504221540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17891 (or 17889 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 504221540 is about 22454.8778665127. The cubic root of 504221540 is about 795.9280277174.

Adding to 504221540 its reverse (45122405), we get a palindrome (549343945).

The spelling of 504221540 in words is "five hundred four million, two hundred twenty-one thousand, five hundred forty".