221102240 has 96 divisors (see below), whose sum is σ = 553936320. Its totient is φ = 83165184.

The previous prime is 221102227. The next prime is 221102251. The reversal of 221102240 is 42201122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781139 + ... + 781421.

It is an arithmetic number, because the mean of its divisors is an integer number (5770170).

Almost surely, 2^221102240 is an apocalyptic number.

221102240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276968160).

221102240 is an abundant number, since it is smaller than the sum of its proper divisors (332834080).

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

221102240 is a wasteful number, since it uses less digits than its factorization.

221102240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221102240 is about 14869.5070530263. The cubic root of 221102240 is about 604.6875786021.

Adding to 221102240 its reverse (42201122), we get a palindrome (263303362).

The spelling of 221102240 in words is "two hundred twenty-one million, one hundred two thousand, two hundred forty".