2194181172 has 36 divisors (see below), whose sum is σ = 5555595136. Its totient is φ = 730181520.

The previous prime is 2194181137. The next prime is 2194181183. The reversal of 2194181172 is 2711814912.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28354 + ... + 72057.

Almost surely, 2^2194181172 is an apocalyptic number.

It is an amenable number.

2194181172 is an abundant number, since it is smaller than the sum of its proper divisors (3361413964).

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

2194181172 is a wasteful number, since it uses less digits than its factorization.

2194181172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101028 (or 101023 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 2194181172 is about 46842.0876135981. The cubic root of 2194181172 is about 1299.4437801949.

The spelling of 2194181172 in words is "two billion, one hundred ninety-four million, one hundred eighty-one thousand, one hundred seventy-two".