22404461 has 4 divisors (see below), whose sum is σ = 23378592. Its totient is φ = 21430332.

The previous prime is 22404427. The next prime is 22404463. The reversal of 22404461 is 16440422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16440422 = 2 ⋅8220211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22404461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 974107 = 22404461 / (2 + 2 + 4 + 0 + 4 + 4 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487031 + ... + 487076.

It is an arithmetic number, because the mean of its divisors is an integer number (5844648).

Almost surely, 2^22404461 is an apocalyptic number.

It is an amenable number.

22404461 is a deficient number, since it is larger than the sum of its proper divisors (974131).

22404461 is an equidigital number, since it uses as much as digits as its factorization.

22404461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974130.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 22404461 is about 4733.3350821593. The cubic root of 22404461 is about 281.9106611355.

Adding to 22404461 its reverse (16440422), we get a palindrome (38844883).

The spelling of 22404461 in words is "twenty-two million, four hundred four thousand, four hundred sixty-one".