53563281 has 4 divisors (see below), whose sum is σ = 71417712. Its totient is φ = 35708852.

The previous prime is 53563259. The next prime is 53563291. The reversal of 53563281 is 18236535.

53563281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 53563281 - 2⁵ = 53563249 is a prime.

It is a super-2 number, since 2×53563281² = 5738050142969922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53563201) 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, 8927211 + ... + 8927216.

It is an arithmetic number, because the mean of its divisors is an integer number (17854428).

Almost surely, 2^53563281 is an apocalyptic number.

It is an amenable number.

53563281 is a deficient number, since it is larger than the sum of its proper divisors (17854431).

53563281 is a wasteful number, since it uses less digits than its factorization.

53563281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17854430.

The product of its digits is 21600, while the sum is 33.

The square root of 53563281 is about 7318.6939408613. The cubic root of 53563281 is about 376.9546085359.

The spelling of 53563281 in words is "fifty-three million, five hundred sixty-three thousand, two hundred eighty-one".