22251813 has 8 divisors (see below), whose sum is σ = 29866176. Its totient is φ = 14736000.

The previous prime is 22251799. The next prime is 22251829. The reversal of 22251813 is 31815222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22251813 - 2⁵ = 22251781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251863) 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 7 ways as a sum of consecutive naturals, for example, 24108 + ... + 25013.

It is an arithmetic number, because the mean of its divisors is an integer number (3733272).

Almost surely, 2^22251813 is an apocalyptic number.

It is an amenable number.

22251813 is a deficient number, since it is larger than the sum of its proper divisors (7614363).

22251813 is a wasteful number, since it uses less digits than its factorization.

22251813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49275.

The product of its digits is 960, while the sum is 24.

The square root of 22251813 is about 4717.1827397293. The cubic root of 22251813 is about 281.2689555619.

The spelling of 22251813 in words is "twenty-two million, two hundred fifty-one thousand, eight hundred thirteen".