54517561 has 8 divisors (see below), whose sum is σ = 64315904. Its totient is φ = 45221760.

The previous prime is 54517559. The next prime is 54517571. The reversal of 54517561 is 16571545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54517561 - 2¹ = 54517559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54517511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125400 + ... + 125833.

It is an arithmetic number, because the mean of its divisors is an integer number (8039488).

Almost surely, 2^54517561 is an apocalyptic number.

It is an amenable number.

54517561 is a deficient number, since it is larger than the sum of its proper divisors (9798343).

54517561 is a wasteful number, since it uses less digits than its factorization.

54517561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251271.

The product of its digits is 21000, while the sum is 34.

The square root of 54517561 is about 7383.6008153204. The cubic root of 54517561 is about 379.1800440852.

The spelling of 54517561 in words is "fifty-four million, five hundred seventeen thousand, five hundred sixty-one".