221440222240 has 48 divisors (see below), whose sum is σ = 523513124568. Its totient is φ = 88515035136.

The previous prime is 221440222231. The next prime is 221440222243. The reversal of 221440222240 is 42222044122.

It can be written as a sum of positive squares in 4 ways, for example, as 218900465424 + 2539756816 = 467868^2 + 50396^2 .

It is not an unprimeable number, because it can be changed into a prime (221440222243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243777 + ... + 708736.

Almost surely, 2^221440222240 is an apocalyptic number.

221440222240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221440222240 is an abundant number, since it is smaller than the sum of its proper divisors (302072902328).

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

221440222240 is a wasteful number, since it uses less digits than its factorization.

221440222240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953981 (or 953973 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 221440222240 its reverse (42222044122), we get a palindrome (263662266362).

The spelling of 221440222240 in words is "two hundred twenty-one billion, four hundred forty million, two hundred twenty-two thousand, two hundred forty".