22861409 has 4 divisors (see below), whose sum is σ = 22873620. Its totient is φ = 22849200.

The previous prime is 22861403. The next prime is 22861417. The reversal of 22861409 is 90416822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90416822 = 2 ⋅45208411.

It can be written as a sum of positive squares in 2 ways, for example, as 20729809 + 2131600 = 4553^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 22861409 - 2¹² = 22857313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22861403) 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, 2642 + ... + 7259.

It is an arithmetic number, because the mean of its divisors is an integer number (5718405).

Almost surely, 2^22861409 is an apocalyptic number.

It is an amenable number.

22861409 is a deficient number, since it is larger than the sum of its proper divisors (12211).

22861409 is an equidigital number, since it uses as much as digits as its factorization.

22861409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12210.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 22861409 is about 4781.3605804206. The cubic root of 22861409 is about 283.8143375881.

The spelling of 22861409 in words is "twenty-two million, eight hundred sixty-one thousand, four hundred nine".