22155563 has 4 divisors (see below), whose sum is σ = 22754400. Its totient is φ = 21556728.

The previous prime is 22155559. The next prime is 22155569. The reversal of 22155563 is 36555122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22155563 - 2² = 22155559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22155569) 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, 299363 + ... + 299436.

It is an arithmetic number, because the mean of its divisors is an integer number (5688600).

Almost surely, 2^22155563 is an apocalyptic number.

22155563 is a deficient number, since it is larger than the sum of its proper divisors (598837).

22155563 is an equidigital number, since it uses as much as digits as its factorization.

22155563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598836.

The product of its digits is 9000, while the sum is 29.

The square root of 22155563 is about 4706.9696196173. The cubic root of 22155563 is about 280.8628273891.

The spelling of 22155563 in words is "twenty-two million, one hundred fifty-five thousand, five hundred sixty-three".