22255521 has 4 divisors (see below), whose sum is σ = 29674032. Its totient is φ = 14837012.

The previous prime is 22255507. The next prime is 22255529. The reversal of 22255521 is 12555222.

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 not a de Polignac number, because 22255521 - 2¹⁷ = 22124449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22255491 and 22255500.

It is not an unprimeable number, because it can be changed into a prime (22255529) 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 3 ways as a sum of consecutive naturals, for example, 3709251 + ... + 3709256.

It is an arithmetic number, because the mean of its divisors is an integer number (7418508).

Almost surely, 2^22255521 is an apocalyptic number.

It is an amenable number.

22255521 is a deficient number, since it is larger than the sum of its proper divisors (7418511).

22255521 is an equidigital number, since it uses as much as digits as its factorization.

22255521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7418510.

The product of its digits is 2000, while the sum is 24.

The square root of 22255521 is about 4717.5757545587. The cubic root of 22255521 is about 281.2845780696.

The spelling of 22255521 in words is "twenty-two million, two hundred fifty-five thousand, five hundred twenty-one".