22113551 has 4 divisors (see below), whose sum is σ = 22443672. Its totient is φ = 21783432.

The previous prime is 22113541. The next prime is 22113577. The reversal of 22113551 is 15531122.

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 22113551 - 2¹⁰ = 22112527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22113521) 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, 164960 + ... + 165093.

It is an arithmetic number, because the mean of its divisors is an integer number (5610918).

Almost surely, 2^22113551 is an apocalyptic number.

22113551 is a deficient number, since it is larger than the sum of its proper divisors (330121).

22113551 is an equidigital number, since it uses as much as digits as its factorization.

22113551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330120.

The product of its digits is 300, while the sum is 20.

The square root of 22113551 is about 4702.5047581050. The cubic root of 22113551 is about 280.6851884034.

Adding to 22113551 its reverse (15531122), we get a palindrome (37644673).

The spelling of 22113551 in words is "twenty-two million, one hundred thirteen thousand, five hundred fifty-one".