221503040 has 56 divisors (see below), whose sum is σ = 575413632. Its totient is φ = 80545280.

The previous prime is 221503039. The next prime is 221503063. The reversal of 221503040 is 40305122.

221503040 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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, 27944 + ... + 34983.

Almost surely, 2^221503040 is an apocalyptic number.

221503040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221503040 is an abundant number, since it is smaller than the sum of its proper divisors (353910592).

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

221503040 is a wasteful number, since it uses less digits than its factorization.

221503040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62955 (or 62945 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 221503040 is about 14882.9781965842. The cubic root of 221503040 is about 605.0527377018.

Adding to 221503040 its reverse (40305122), we get a palindrome (261808162).

The spelling of 221503040 in words is "two hundred twenty-one million, five hundred three thousand, forty".