22961191 has 4 divisors (see below), whose sum is σ = 25048584. Its totient is φ = 20873800.

The previous prime is 22961171. The next prime is 22961209. The reversal of 22961191 is 19116922.

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

It is a cyclic number.

It is not a de Polignac number, because 22961191 - 2¹¹ = 22959143 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22961131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043680 + ... + 1043701.

It is an arithmetic number, because the mean of its divisors is an integer number (6262146).

Almost surely, 2^22961191 is an apocalyptic number.

22961191 is a deficient number, since it is larger than the sum of its proper divisors (2087393).

22961191 is a wasteful number, since it uses less digits than its factorization.

22961191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087392.

The product of its digits is 1944, while the sum is 31.

The square root of 22961191 is about 4791.7836971216. The cubic root of 22961191 is about 284.2266548430.

The spelling of 22961191 in words is "twenty-two million, nine hundred sixty-one thousand, one hundred ninety-one".