54203561 has 4 divisors (see below), whose sum is σ = 57056400. Its totient is φ = 51350724.

The previous prime is 54203537. The next prime is 54203609. The reversal of 54203561 is 16530245.

54203561 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, and also an emirpimes, since its reverse is a distinct semiprime: 16530245 = 5 ⋅3306049.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54203561 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 54203561.

It is not an unprimeable number, because it can be changed into a prime (54203761) 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, 1426391 + ... + 1426428.

It is an arithmetic number, because the mean of its divisors is an integer number (14264100).

Almost surely, 2^54203561 is an apocalyptic number.

It is an amenable number.

54203561 is a deficient number, since it is larger than the sum of its proper divisors (2852839).

54203561 is a wasteful number, since it uses less digits than its factorization.

54203561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852838.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 54203561 is about 7362.3067716579. The cubic root of 54203561 is about 378.4506653274.

The spelling of 54203561 in words is "fifty-four million, two hundred three thousand, five hundred sixty-one".