22161001 has 8 divisors (see below), whose sum is σ = 23168000. Its totient is φ = 21172320.

The previous prime is 22160993. The next prime is 22161023. The reversal of 22161001 is 10016122.

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

It is a cyclic number.

It is not a de Polignac number, because 22161001 - 2³ = 22160993 is a prime.

It is a super-2 number, since 2×22161001² = 982219930644002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22161031) 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, 2076 + ... + 6973.

It is an arithmetic number, because the mean of its divisors is an integer number (2896000).

Almost surely, 2^22161001 is an apocalyptic number.

It is an amenable number.

22161001 is a deficient number, since it is larger than the sum of its proper divisors (1006999).

22161001 is an equidigital number, since it uses as much as digits as its factorization.

22161001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 22161001 is about 4707.5472382123. The cubic root of 22161001 is about 280.8858044192.

Adding to 22161001 its reverse (10016122), we get a palindrome (32177123).

The spelling of 22161001 in words is "twenty-two million, one hundred sixty-one thousand, one".