16442513 has 2 divisors, whose sum is σ = 16442514. Its totient is φ = 16442512.

The previous prime is 16442509. The next prime is 16442521. The reversal of 16442513 is 31524461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14961424 + 1481089 = 3868^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442513 - 2² = 16442509 is a prime.

It is a super-3 number, since 3×16442513³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16442113) 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, 8221256 + 8221257.

It is an arithmetic number, because the mean of its divisors is an integer number (8221257).

Almost surely, 2^16442513 is an apocalyptic number.

It is an amenable number.

16442513 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442513 is an equidigital number, since it uses as much as digits as its factorization.

16442513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 16442513 is about 4054.9368675727. The cubic root of 16442513 is about 254.2861645497.

Adding to 16442513 its reverse (31524461), we get a palindrome (47966974).

The spelling of 16442513 in words is "sixteen million, four hundred forty-two thousand, five hundred thirteen".