22170561 has 8 divisors (see below), whose sum is σ = 33783744. Its totient is φ = 12668880.

The previous prime is 22170559. The next prime is 22170563. The reversal of 22170561 is 16507122.

It is an interprime number because it is at equal distance from previous prime (22170559) and next prime (22170563).

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

It is not a de Polignac number, because 22170561 - 2¹ = 22170559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22170563) 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, 527850 + ... + 527891.

It is an arithmetic number, because the mean of its divisors is an integer number (4222968).

Almost surely, 2^22170561 is an apocalyptic number.

22170561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22170561 is a deficient number, since it is larger than the sum of its proper divisors (11613183).

22170561 is a wasteful number, since it uses less digits than its factorization.

22170561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055751.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 22170561 is about 4708.5625194957. The cubic root of 22170561 is about 280.9261889104.

Adding to 22170561 its reverse (16507122), we get a palindrome (38677683).

The spelling of 22170561 in words is "twenty-two million, one hundred seventy thousand, five hundred sixty-one".