22131194 has 4 divisors (see below), whose sum is σ = 33196794. Its totient is φ = 11065596.

The previous prime is 22131133. The next prime is 22131199. The reversal of 22131194 is 49113122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49113122 = 2 ⋅24556561.

It can be written as a sum of positive squares in only one way, i.e., 16104169 + 6027025 = 4013^2 + 2455^2 .

It is not an unprimeable number, because it can be changed into a prime (22131199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5532797 + ... + 5532800.

Almost surely, 2^22131194 is an apocalyptic number.

22131194 is a deficient number, since it is larger than the sum of its proper divisors (11065600).

22131194 is a wasteful number, since it uses less digits than its factorization.

22131194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065599.

The product of its digits is 432, while the sum is 23.

The square root of 22131194 is about 4704.3802992530. The cubic root of 22131194 is about 280.7598155308.

The spelling of 22131194 in words is "twenty-two million, one hundred thirty-one thousand, one hundred ninety-four".