221440203240 has 32 divisors (see below), whose sum is σ = 664320610080. Its totient is φ = 59050720832.

The previous prime is 221440203211. The next prime is 221440203263. The reversal of 221440203240 is 42302044122.

It is a super-2 number, since 2×221440203240² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 221440203240.

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, 922667394 + ... + 922667633.

It is an arithmetic number, because the mean of its divisors is an integer number (20760019065).

Almost surely, 2^221440203240 is an apocalyptic number.

221440203240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221440203240 is an abundant number, since it is smaller than the sum of its proper divisors (442880406840).

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

221440203240 is a wasteful number, since it uses less digits than its factorization.

221440203240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845335041 (or 1845335037 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221440203240 its reverse (42302044122), we get a palindrome (263742247362).

The spelling of 221440203240 in words is "two hundred twenty-one billion, four hundred forty million, two hundred three thousand, two hundred forty".