22162001 has 4 divisors (see below), whose sum is σ = 22761012. Its totient is φ = 21562992.

The previous prime is 22161991. The next prime is 22162009. The reversal of 22162001 is 10026122.

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 21160000 + 1002001 = 4600^2 + 1001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22162001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22162009) 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, 299450 + ... + 299523.

It is an arithmetic number, because the mean of its divisors is an integer number (5690253).

Almost surely, 2^22162001 is an apocalyptic number.

It is an amenable number.

22162001 is a deficient number, since it is larger than the sum of its proper divisors (599011).

22162001 is an equidigital number, since it uses as much as digits as its factorization.

22162001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599010.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 22162001 is about 4707.6534494374. The cubic root of 22162001 is about 280.8900292822.

Adding to 22162001 its reverse (10026122), we get a palindrome (32188123).

The spelling of 22162001 in words is "twenty-two million, one hundred sixty-two thousand, one".