221534403654772 has 48 divisors (see below), whose sum is σ = 417956474275200. Its totient is φ = 102136629214080.

The previous prime is 221534403654769. The next prime is 221534403654791. The reversal of 221534403654772 is 277456304435122.

It is a happy number.

It is a congruent number.

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, 516015379 + ... + 516444517.

It is an arithmetic number, because the mean of its divisors is an integer number (8707426547400).

Almost surely, 2^{221534403654772} is an apocalyptic number.

It is an amenable number.

221534403654772 is a deficient number, since it is larger than the sum of its proper divisors (196422070620428).

221534403654772 is a wasteful number, since it uses less digits than its factorization.

221534403654772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439816 (or 439814 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 55.

The spelling of 221534403654772 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred three million, six hundred fifty-four thousand, seven hundred seventy-two".