221011040 has 48 divisors (see below), whose sum is σ = 549627120. Its totient is φ = 83750400.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011040 is 40110122.

It is a congruent number.

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, 33311 + ... + 39390.

It is an arithmetic number, because the mean of its divisors is an integer number (11450565).

Almost surely, 2^221011040 is an apocalyptic number.

221011040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221011040 is an abundant number, since it is smaller than the sum of its proper divisors (328616080).

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

221011040 is a wasteful number, since it uses less digits than its factorization.

221011040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72735 (or 72727 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221011040 is about 14866.4400580637. The cubic root of 221011040 is about 604.6044268872.

Adding to 221011040 its reverse (40110122), we get a palindrome (261121162).

The spelling of 221011040 in words is "two hundred twenty-one million, eleven thousand, forty".