54205551 has 8 divisors (see below), whose sum is σ = 80304560. Its totient is φ = 36137016.

The previous prime is 54205531. The next prime is 54205561. The reversal of 54205551 is 15550245.

It is not a de Polignac number, because 54205551 - 2⁵ = 54205519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2007613 = 54205551 / (5 + 4 + 2 + 0 + 5 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54205531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003780 + ... + 1003833.

It is an arithmetic number, because the mean of its divisors is an integer number (10038070).

Almost surely, 2^54205551 is an apocalyptic number.

54205551 is a deficient number, since it is larger than the sum of its proper divisors (26099009).

54205551 is a wasteful number, since it uses less digits than its factorization.

54205551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007622 (or 2007616 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 54205551 is about 7362.4419182768. The cubic root of 54205551 is about 378.4552966813.

Adding to 54205551 its reverse (15550245), we get a palindrome (69755796).

It can be divided in two parts, 54205 and 551, that added together give a square (54756 = 234²).

The spelling of 54205551 in words is "fifty-four million, two hundred five thousand, five hundred fifty-one".