16315553 has 4 divisors (see below), whose sum is σ = 16343040. Its totient is φ = 16288068.

The previous prime is 16315531. The next prime is 16315561. The reversal of 16315553 is 35551361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35551361 = 29 ⋅1225909.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16315553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16314553) 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 in 3 ways as a sum of consecutive naturals, for example, 12833 + ... + 14046.

It is an arithmetic number, because the mean of its divisors is an integer number (4085760).

Almost surely, 2^16315553 is an apocalyptic number.

It is an amenable number.

16315553 is a deficient number, since it is larger than the sum of its proper divisors (27487).

16315553 is an equidigital number, since it uses as much as digits as its factorization.

16315553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27486.

The product of its digits is 6750, while the sum is 29.

The square root of 16315553 is about 4039.2515395801. The cubic root of 16315553 is about 253.6299870086.

The spelling of 16315553 in words is "sixteen million, three hundred fifteen thousand, five hundred fifty-three".