2161433194 has 4 divisors (see below), whose sum is σ = 3242149794. Its totient is φ = 1080716596.

The previous prime is 2161433167. The next prime is 2161433201. The reversal of 2161433194 is 4913341612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2030673969 + 130759225 = 45063^2 + 11435^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540358297 + ... + 540358300.

Almost surely, 2^2161433194 is an apocalyptic number.

2161433194 is a deficient number, since it is larger than the sum of its proper divisors (1080716600).

2161433194 is a wasteful number, since it uses less digits than its factorization.

2161433194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080716599.

The product of its digits is 15552, while the sum is 34.

The square root of 2161433194 is about 46491.2163101806. The cubic root of 2161433194 is about 1292.9466510752.

The spelling of 2161433194 in words is "two billion, one hundred sixty-one million, four hundred thirty-three thousand, one hundred ninety-four".