220221003440 has 20 divisors (see below), whose sum is σ = 512013833184. Its totient is φ = 88088401344.

The previous prime is 220221003439. The next prime is 220221003493. The reversal of 220221003440 is 44300122022.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×220221003440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376381192 + ... + 1376381351.

Almost surely, 2^220221003440 is an apocalyptic number.

220221003440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220221003440 is an abundant number, since it is smaller than the sum of its proper divisors (291792829744).

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

220221003440 is a wasteful number, since it uses less digits than its factorization.

220221003440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752762556 (or 2752762550 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 220221003440 its reverse (44300122022), we get a palindrome (264521125462).

The spelling of 220221003440 in words is "two hundred twenty billion, two hundred twenty-one million, three thousand, four hundred forty".