16542553 has 2 divisors, whose sum is σ = 16542554. Its totient is φ = 16542552.

The previous prime is 16542551. The next prime is 16542569. The reversal of 16542553 is 35524561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9290304 + 7252249 = 3048^2 + 2693^2 .

It is a cyclic number.

It is not a de Polignac number, because 16542553 - 2¹ = 16542551 is a prime.

Together with 16542551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16542551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8271276 + 8271277.

It is an arithmetic number, because the mean of its divisors is an integer number (8271277).

Almost surely, 2^16542553 is an apocalyptic number.

It is an amenable number.

16542553 is a deficient number, since it is larger than the sum of its proper divisors (1).

16542553 is an equidigital number, since it uses as much as digits as its factorization.

16542553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 16542553 is about 4067.2537417771. The cubic root of 16542553 is about 254.8008338461.

The spelling of 16542553 in words is "sixteen million, five hundred forty-two thousand, five hundred fifty-three".