22112501 has 4 divisors (see below), whose sum is σ = 22529772. Its totient is φ = 21695232.

The previous prime is 22112491. The next prime is 22112507. The reversal of 22112501 is 10521122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10521122 = 2 ⋅5260561.

It can be written as a sum of positive squares in 2 ways, for example, as 13498276 + 8614225 = 3674^2 + 2935^2 .

It is not a de Polignac number, because 22112501 - 2¹⁸ = 21850357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112507) 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, 208556 + ... + 208661.

It is an arithmetic number, because the mean of its divisors is an integer number (5632443).

Almost surely, 2^22112501 is an apocalyptic number.

It is an amenable number.

22112501 is a deficient number, since it is larger than the sum of its proper divisors (417271).

22112501 is an equidigital number, since it uses as much as digits as its factorization.

22112501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417270.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 22112501 is about 4702.3931141494. The cubic root of 22112501 is about 280.6807458165.

Adding to 22112501 its reverse (10521122), we get a palindrome (32633623).

The spelling of 22112501 in words is "twenty-two million, one hundred twelve thousand, five hundred one".