16224451 has 2 divisors, whose sum is σ = 16224452. Its totient is φ = 16224450.

The previous prime is 16224449. The next prime is 16224473. The reversal of 16224451 is 15442261.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16224451 - 2¹ = 16224449 is a prime.

Together with 16224449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16224751) 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 as a sum of consecutive naturals, namely, 8112225 + 8112226.

It is an arithmetic number, because the mean of its divisors is an integer number (8112226).

Almost surely, 2^16224451 is an apocalyptic number.

16224451 is a deficient number, since it is larger than the sum of its proper divisors (1).

16224451 is an equidigital number, since it uses as much as digits as its factorization.

16224451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 16224451 is about 4027.9586641375. The cubic root of 16224451 is about 253.1570366605.

The spelling of 16224451 in words is "sixteen million, two hundred twenty-four thousand, four hundred fifty-one".