22725591 has 8 divisors (see below), whose sum is σ = 34629504. Its totient is φ = 12986040.

The previous prime is 22725569. The next prime is 22725607. The reversal of 22725591 is 19552722.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22725591 - 2¹⁴ = 22709207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22725551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541065 + ... + 541106.

It is an arithmetic number, because the mean of its divisors is an integer number (4328688).

Almost surely, 2^22725591 is an apocalyptic number.

22725591 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22725591 is a deficient number, since it is larger than the sum of its proper divisors (11903913).

22725591 is a wasteful number, since it uses less digits than its factorization.

22725591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082181.

The product of its digits is 12600, while the sum is 33.

The square root of 22725591 is about 4767.1365619206. The cubic root of 22725591 is about 283.2511806419.

The spelling of 22725591 in words is "twenty-two million, seven hundred twenty-five thousand, five hundred ninety-one".