54117551 has 4 divisors (see below), whose sum is σ = 56470512. Its totient is φ = 51764592.

The previous prime is 54117527. The next prime is 54117559. The reversal of 54117551 is 15571145.

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-54117551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54117559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176446 + ... + 1176491.

It is an arithmetic number, because the mean of its divisors is an integer number (14117628).

Almost surely, 2^54117551 is an apocalyptic number.

54117551 is a deficient number, since it is larger than the sum of its proper divisors (2352961).

54117551 is a wasteful number, since it uses less digits than its factorization.

54117551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352960.

The product of its digits is 3500, while the sum is 29.

The square root of 54117551 is about 7356.4632127130. The cubic root of 54117551 is about 378.2503846734.

Adding to 54117551 its reverse (15571145), we get a palindrome (69688696).

The spelling of 54117551 in words is "fifty-four million, one hundred seventeen thousand, five hundred fifty-one".