221422000645578 has 32 divisors (see below), whose sum is σ = 466162059018240. Its totient is φ = 69921165239280.

The previous prime is 221422000645577. The next prime is 221422000645591. The reversal of 221422000645578 is 875546000224122.

221422000645578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221422000645577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16731850 + ... + 26884917.

It is an arithmetic number, because the mean of its divisors is an integer number (14567564344320).

Almost surely, 2^{221422000645578} is an apocalyptic number.

221422000645578 is an abundant number, since it is smaller than the sum of its proper divisors (244740058372662).

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

221422000645578 is a wasteful number, since it uses less digits than its factorization.

221422000645578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43661322.

The product of its (nonzero) digits is 2150400, while the sum is 48.

The spelling of 221422000645578 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, five hundred seventy-eight".