22161449 has 2 divisors, whose sum is σ = 22161450. Its totient is φ = 22161448.

The previous prime is 22161437. The next prime is 22161463. The reversal of 22161449 is 94416122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13191424 + 8970025 = 3632^2 + 2995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22161449 is a prime.

It is a super-2 number, since 2×22161449² = 982259643559202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22161479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11080724 + 11080725.

It is an arithmetic number, because the mean of its divisors is an integer number (11080725).

Almost surely, 2^22161449 is an apocalyptic number.

It is an amenable number.

22161449 is a deficient number, since it is larger than the sum of its proper divisors (1).

22161449 is an equidigital number, since it uses as much as digits as its factorization.

22161449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 22161449 is about 4707.5948211374. The cubic root of 22161449 is about 280.8876971736.

The spelling of 22161449 in words is "twenty-two million, one hundred sixty-one thousand, four hundred forty-nine".