22201601 has 6 divisors (see below), whose sum is σ = 23209410. Its totient is φ = 21235808.

The previous prime is 22201579. The next prime is 22201661. The reversal of 22201601 is 10610222.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 4096576 = 4255^2 + 2024^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22201601 is a prime.

It is a super-2 number, since 2×22201601² = 985822173926402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22201661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20456 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (3868235).

Almost surely, 2^22201601 is an apocalyptic number.

It is an amenable number.

22201601 is a deficient number, since it is larger than the sum of its proper divisors (1007809).

22201601 is an equidigital number, since it uses as much as digits as its factorization.

22201601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42015 (or 41992 counting only the distinct ones).

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

The square root of 22201601 is about 4711.8574893560. The cubic root of 22201601 is about 281.0572317920.

Adding to 22201601 its reverse (10610222), we get a palindrome (32811823).

The spelling of 22201601 in words is "twenty-two million, two hundred one thousand, six hundred one".