22154553 has 48 divisors (see below), whose sum is σ = 36481536. Its totient is φ = 13374720.

The previous prime is 22154549. The next prime is 22154563. The reversal of 22154553 is 35545122.

It is a happy number.

It is not a de Polignac number, because 22154553 - 2² = 22154549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22154533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127975 + ... + 128147.

It is an arithmetic number, because the mean of its divisors is an integer number (760032).

Almost surely, 2^22154553 is an apocalyptic number.

It is an amenable number.

22154553 is a deficient number, since it is larger than the sum of its proper divisors (14326983).

22154553 is a wasteful number, since it uses less digits than its factorization.

22154553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 224 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 22154553 is about 4706.8623306827. The cubic root of 22154553 is about 280.8585594502.

Adding to 22154553 its reverse (35545122), we get a palindrome (57699675).

The spelling of 22154553 in words is "twenty-two million, one hundred fifty-four thousand, five hundred fifty-three".