54661543 has 4 divisors (see below), whose sum is σ = 56138920. Its totient is φ = 53184168.

The previous prime is 54661531. The next prime is 54661571. The reversal of 54661543 is 34516645.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54661543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54661499 and 54661508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54661573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738633 + ... + 738706.

It is an arithmetic number, because the mean of its divisors is an integer number (14034730).

Almost surely, 2^54661543 is an apocalyptic number.

54661543 is a deficient number, since it is larger than the sum of its proper divisors (1477377).

54661543 is a wasteful number, since it uses less digits than its factorization.

54661543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477376.

The product of its digits is 43200, while the sum is 34.

The square root of 54661543 is about 7393.3445070550. The cubic root of 54661543 is about 379.5135580835.

The spelling of 54661543 in words is "fifty-four million, six hundred sixty-one thousand, five hundred forty-three".