22500405 has 12 divisors (see below), whose sum is σ = 39000780. Its totient is φ = 12000192.

The previous prime is 22500391. The next prime is 22500419. The reversal of 22500405 is 50400522.

It is an interprime number because it is at equal distance from previous prime (22500391) and next prime (22500419).

It can be written as a sum of positive squares in 2 ways, for example, as 7800849 + 14699556 = 2793^2 + 3834^2 .

It is not a de Polignac number, because 22500405 - 2¹⁵ = 22467637 is a prime.

22500405 is a modest number, since divided by 405 gives 225 as remainder.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 249960 + ... + 250049.

It is an arithmetic number, because the mean of its divisors is an integer number (3250065).

Almost surely, 2^22500405 is an apocalyptic number.

It is an amenable number.

22500405 is a deficient number, since it is larger than the sum of its proper divisors (16500375).

22500405 is a wasteful number, since it uses less digits than its factorization.

22500405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500020 (or 500017 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22500405 is about 4743.4591808089. The cubic root of 22500405 is about 282.3125025190.

Adding to 22500405 its reverse (50400522), we get a palindrome (72900927).

The spelling of 22500405 in words is "twenty-two million, five hundred thousand, four hundred five".