2221994178 has 24 divisors (see below), whose sum is σ = 5067706800. Its totient is φ = 701682264.

The previous prime is 2221994171. The next prime is 2221994179. The reversal of 2221994178 is 8714991222.

2221994178 is a `hidden beast` number, since 2 + 221 + 9 + 9 + 417 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (2221994171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3248188 + ... + 3248871.

It is an arithmetic number, because the mean of its divisors is an integer number (211154450).

Almost surely, 2^2221994178 is an apocalyptic number.

2221994178 is an abundant number, since it is smaller than the sum of its proper divisors (2845712622).

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

2221994178 is a wasteful number, since it uses less digits than its factorization.

2221994178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497086 (or 6497083 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2221994178 is about 47138.0332428072. The cubic root of 2221994178 is about 1304.9112407153.

The spelling of 2221994178 in words is "two billion, two hundred twenty-one million, nine hundred ninety-four thousand, one hundred seventy-eight".