22404149 has 2 divisors, whose sum is σ = 22404150. Its totient is φ = 22404148.

The previous prime is 22404143. The next prime is 22404209. The reversal of 22404149 is 94140422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21921124 + 483025 = 4682^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 22404149 - 2²⁰ = 21355573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22404143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11202074 + 11202075.

It is an arithmetic number, because the mean of its divisors is an integer number (11202075).

Almost surely, 2^22404149 is an apocalyptic number.

It is an amenable number.

22404149 is a deficient number, since it is larger than the sum of its proper divisors (1).

22404149 is an equidigital number, since it uses as much as digits as its factorization.

22404149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 22404149 is about 4733.3021243103. The cubic root of 22404149 is about 281.9093525191.

The spelling of 22404149 in words is "twenty-two million, four hundred four thousand, one hundred forty-nine".