22261553 has 4 divisors (see below), whose sum is σ = 22575168. Its totient is φ = 21947940.

The previous prime is 22261549. The next prime is 22261571. The reversal of 22261553 is 35516222.

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 22261553 - 2² = 22261549 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (22261153) 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, 156701 + ... + 156842.

It is an arithmetic number, because the mean of its divisors is an integer number (5643792).

Almost surely, 2^22261553 is an apocalyptic number.

It is an amenable number.

22261553 is a deficient number, since it is larger than the sum of its proper divisors (313615).

22261553 is an equidigital number, since it uses as much as digits as its factorization.

22261553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313614.

The product of its digits is 3600, while the sum is 26.

The square root of 22261553 is about 4718.2150226542. The cubic root of 22261553 is about 281.3099883234.

Adding to 22261553 its reverse (35516222), we get a palindrome (57777775).

The spelling of 22261553 in words is "twenty-two million, two hundred sixty-one thousand, five hundred fifty-three".