221543155321356 has 48 divisors (see below), whose sum is σ = 563929464067200. Its totient is φ = 67134118974720.

The previous prime is 221543155321333. The next prime is 221543155321489. The reversal of 221543155321356 is 653123551345122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56022660 + ... + 59846676.

It is an arithmetic number, because the mean of its divisors is an integer number (11748530501400).

Almost surely, 2^{221543155321356} is an apocalyptic number.

It is an amenable number.

221543155321356 is an abundant number, since it is smaller than the sum of its proper divisors (342386308745844).

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

221543155321356 is a wasteful number, since it uses less digits than its factorization.

221543155321356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262934 (or 4262932 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The spelling of 221543155321356 in words is "two hundred twenty-one trillion, five hundred forty-three billion, one hundred fifty-five million, three hundred twenty-one thousand, three hundred fifty-six".