221513055440 has 40 divisors (see below), whose sum is σ = 515040035328. Its totient is φ = 88601406080.

The previous prime is 221513055403. The next prime is 221513055457. The reversal of 221513055440 is 44550315122.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 221513055397 and 221513055406.

It is a congruent number.

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, 2482805 + ... + 2570475.

Almost surely, 2^221513055440 is an apocalyptic number.

221513055440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221513055440 is an abundant number, since it is smaller than the sum of its proper divisors (293526979888).

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

221513055440 is a wasteful number, since it uses less digits than its factorization.

221513055440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119267 (or 119261 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 221513055440 in words is "two hundred twenty-one billion, five hundred thirteen million, fifty-five thousand, four hundred forty".