12563553 has 4 divisors (see below), whose sum is σ = 16751408. Its totient is φ = 8375700.

The previous prime is 12563539. The next prime is 12563557. The reversal of 12563553 is 35536521.

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: 35536521 = 3 ⋅11845507.

It is not a de Polignac number, because 12563553 - 2¹⁸ = 12301409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12563553.

It is not an unprimeable number, because it can be changed into a prime (12563557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093923 + ... + 2093928.

It is an arithmetic number, because the mean of its divisors is an integer number (4187852).

Almost surely, 2^12563553 is an apocalyptic number.

It is an amenable number.

12563553 is a deficient number, since it is larger than the sum of its proper divisors (4187855).

12563553 is an equidigital number, since it uses as much as digits as its factorization.

12563553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187854.

The product of its digits is 13500, while the sum is 30.

The square root of 12563553 is about 3544.5102623635. The cubic root of 12563553 is about 232.4720928465.

The spelling of 12563553 in words is "twelve million, five hundred sixty-three thousand, five hundred fifty-three".