22081725 has 72 divisors (see below), whose sum is σ = 43872192. Its totient is φ = 10560000.

The previous prime is 22081723. The next prime is 22081733. The reversal of 22081725 is 52718022.

It is not a de Polignac number, because 22081725 - 2¹ = 22081723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22081721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 87850 + ... + 88100.

It is an arithmetic number, because the mean of its divisors is an integer number (609336).

Almost surely, 2^22081725 is an apocalyptic number.

22081725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22081725 is a deficient number, since it is larger than the sum of its proper divisors (21790467).

22081725 is a wasteful number, since it uses less digits than its factorization.

22081725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22081725 is about 4699.1195983929. The cubic root of 22081725 is about 280.5504689613.

Adding to 22081725 its reverse (52718022), we get a palindrome (74799747).

The spelling of 22081725 in words is "twenty-two million, eighty-one thousand, seven hundred twenty-five".