22004131 has 4 divisors (see below), whose sum is σ = 22472352. Its totient is φ = 21535912.

The previous prime is 22004119. The next prime is 22004149. The reversal of 22004131 is 13140022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22004131 is a prime.

It is a super-2 number, since 2×22004131² = 968363562130322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22004111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234040 + ... + 234133.

It is an arithmetic number, because the mean of its divisors is an integer number (5618088).

Almost surely, 2^22004131 is an apocalyptic number.

22004131 is a deficient number, since it is larger than the sum of its proper divisors (468221).

22004131 is an equidigital number, since it uses as much as digits as its factorization.

22004131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468220.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22004131 is about 4690.8561052328. The cubic root of 22004131 is about 280.2214701868.

Adding to 22004131 its reverse (13140022), we get a palindrome (35144153).

The spelling of 22004131 in words is "twenty-two million, four thousand, one hundred thirty-one".