22725191 has 4 divisors (see below), whose sum is σ = 22759632. Its totient is φ = 22690752.

The previous prime is 22725187. The next prime is 22725211. The reversal of 22725191 is 19152722.

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 22725191 - 2² = 22725187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22725161) 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, 16211 + ... + 17556.

It is an arithmetic number, because the mean of its divisors is an integer number (5689908).

Almost surely, 2^22725191 is an apocalyptic number.

22725191 is a deficient number, since it is larger than the sum of its proper divisors (34441).

22725191 is an equidigital number, since it uses as much as digits as its factorization.

22725191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34440.

The product of its digits is 2520, while the sum is 29.

The square root of 22725191 is about 4767.0946078298. The cubic root of 22725191 is about 283.2495187689.

The spelling of 22725191 in words is "twenty-two million, seven hundred twenty-five thousand, one hundred ninety-one".