22025261 has 4 divisors (see below), whose sum is σ = 22043712. Its totient is φ = 22006812.

The previous prime is 22025243. The next prime is 22025273. The reversal of 22025261 is 16252022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22025261 is a prime.

It is a super-2 number, since 2×22025261² = 970224244236242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22025561) 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, 7301 + ... + 9866.

It is an arithmetic number, because the mean of its divisors is an integer number (5510928).

Almost surely, 2^22025261 is an apocalyptic number.

It is an amenable number.

22025261 is a deficient number, since it is larger than the sum of its proper divisors (18451).

22025261 is a wasteful number, since it uses less digits than its factorization.

22025261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18450.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22025261 is about 4693.1078189191. The cubic root of 22025261 is about 280.3111379768.

Adding to 22025261 its reverse (16252022), we get a palindrome (38277283).

The spelling of 22025261 in words is "twenty-two million, twenty-five thousand, two hundred sixty-one".