22188101 has 4 divisors (see below), whose sum is σ = 23894892. Its totient is φ = 20481312.

The previous prime is 22188097. The next prime is 22188119. The reversal of 22188101 is 10188122.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2563201 + 19624900 = 1601^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 22188101 - 2² = 22188097 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 (22188191) 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, 853376 + ... + 853401.

It is an arithmetic number, because the mean of its divisors is an integer number (5973723).

Almost surely, 2^22188101 is an apocalyptic number.

It is an amenable number.

22188101 is a deficient number, since it is larger than the sum of its proper divisors (1706791).

22188101 is a wasteful number, since it uses less digits than its factorization.

22188101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706790.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 22188101 is about 4710.4247154583. The cubic root of 22188101 is about 281.0002532894. Note that the first 3 decimals are identical.

The spelling of 22188101 in words is "twenty-two million, one hundred eighty-eight thousand, one hundred one".