221103553440 has 192 divisors, whose sum is σ = 868334100480. Its totient is φ = 45943587840.

The previous prime is 221103553399. The next prime is 221103553453. The reversal of 221103553440 is 44355301122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 221103553398 and 221103553407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2954160 + ... + 3028079.

It is an arithmetic number, because the mean of its divisors is an integer number (4522573440).

Almost surely, 2^221103553440 is an apocalyptic number.

221103553440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221103553440 is an abundant number, since it is smaller than the sum of its proper divisors (647230547040).

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

221103553440 is a wasteful number, since it uses less digits than its factorization.

221103553440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5982275 (or 5982267 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 221103553440 its reverse (44355301122), we get a palindrome (265458854562).

The spelling of 221103553440 in words is "two hundred twenty-one billion, one hundred three million, five hundred fifty-three thousand, four hundred forty".