54112561 has 4 divisors (see below), whose sum is σ = 54502000. Its totient is φ = 53723124.

The previous prime is 54112549. The next prime is 54112567. The reversal of 54112561 is 16521145.

It is a happy number.

54112561 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 54112561 - 2⁵ = 54112529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54112567) 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, 194511 + ... + 194788.

It is an arithmetic number, because the mean of its divisors is an integer number (13625500).

Almost surely, 2^54112561 is an apocalyptic number.

It is an amenable number.

54112561 is a deficient number, since it is larger than the sum of its proper divisors (389439).

54112561 is a wasteful number, since it uses less digits than its factorization.

54112561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389438.

The product of its digits is 1200, while the sum is 25.

The square root of 54112561 is about 7356.1240473499. The cubic root of 54112561 is about 378.2387585780.

The spelling of 54112561 in words is "fifty-four million, one hundred twelve thousand, five hundred sixty-one".