221353662460 has 24 divisors (see below), whose sum is σ = 531248790240. Its totient is φ = 75892684224.

The previous prime is 221353662449. The next prime is 221353662487. The reversal of 221353662460 is 64266353122.

It is a super-2 number, since 2×221353662460² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790548655 + ... + 790548934.

It is an arithmetic number, because the mean of its divisors is an integer number (22135366260).

Almost surely, 2^221353662460 is an apocalyptic number.

221353662460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221353662460 is an abundant number, since it is smaller than the sum of its proper divisors (309895127780).

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

221353662460 is a wasteful number, since it uses less digits than its factorization.

221353662460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581097605 (or 1581097603 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 221353662460 in words is "two hundred twenty-one billion, three hundred fifty-three million, six hundred sixty-two thousand, four hundred sixty".