16105553 has 2 divisors, whose sum is σ = 16105554. Its totient is φ = 16105552.

The previous prime is 16105549. The next prime is 16105571. The reversal of 16105553 is 35550161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 9409 = 4012^2 + 97^2 .

It is an emirp because it is prime and its reverse (35550161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16105553 - 2² = 16105549 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16105253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8052776 + 8052777.

It is an arithmetic number, because the mean of its divisors is an integer number (8052777).

Almost surely, 2^16105553 is an apocalyptic number.

It is an amenable number.

16105553 is a deficient number, since it is larger than the sum of its proper divisors (1).

16105553 is an equidigital number, since it uses as much as digits as its factorization.

16105553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 16105553 is about 4013.1724358667. The cubic root of 16105553 is about 252.5371144346.

The spelling of 16105553 in words is "sixteen million, one hundred five thousand, five hundred fifty-three".