221987349465384 has 32 divisors (see below), whose sum is σ = 555370233539040. Its totient is φ = 73942201838400.

The previous prime is 221987349465367. The next prime is 221987349465449. The reversal of 221987349465384 is 483564943789122.

It is a super-2 number, since 2×221987349465384² (a number of 29 digits) contains 22 as substring.

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, 3348798462 + ... + 3348864749.

It is an arithmetic number, because the mean of its divisors is an integer number (17355319798095).

Almost surely, 2^{221987349465384} is an apocalyptic number.

221987349465384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221987349465384 is an abundant number, since it is smaller than the sum of its proper divisors (333382884073656).

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

221987349465384 is a wasteful number, since it uses less digits than its factorization.

221987349465384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6697664601 (or 6697664597 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 75.

The spelling of 221987349465384 in words is "two hundred twenty-one trillion, nine hundred eighty-seven billion, three hundred forty-nine million, four hundred sixty-five thousand, three hundred eighty-four".