22091425 has 12 divisors (see below), whose sum is σ = 27459180. Its totient is φ = 17630720.

The previous prime is 22091423. The next prime is 22091453. The reversal of 22091425 is 52419022.

It can be written as a sum of positive squares in 6 ways, for example, as 6155361 + 15936064 = 2481^2 + 3992^2 .

It is not a de Polignac number, because 22091425 - 2¹ = 22091423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 22091425.

It is not an unprimeable number, because it can be changed into a prime (22091423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13449 + ... + 15001.

It is an arithmetic number, because the mean of its divisors is an integer number (2288265).

Almost surely, 2^22091425 is an apocalyptic number.

22091425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22091425 is a deficient number, since it is larger than the sum of its proper divisors (5367755).

22091425 is a wasteful number, since it uses less digits than its factorization.

22091425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 22091425 is about 4700.1515932999. The cubic root of 22091425 is about 280.5915427628.

The spelling of 22091425 in words is "twenty-two million, ninety-one thousand, four hundred twenty-five".