54665819 has 4 divisors (see below), whose sum is σ = 58870896. Its totient is φ = 50460744.

The previous prime is 54665791. The next prime is 54665837. The reversal of 54665819 is 91856645.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91856645 = 5 ⋅18371329.

It is a cyclic number.

It is not a de Polignac number, because 54665819 - 2⁸ = 54665563 is a prime.

It is a super-2 number, since 2×54665819² = 5976703533881522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54665819.

It is not an unprimeable number, because it can be changed into a prime (54665839) 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, 2102519 + ... + 2102544.

It is an arithmetic number, because the mean of its divisors is an integer number (14717724).

Almost surely, 2^54665819 is an apocalyptic number.

54665819 is a deficient number, since it is larger than the sum of its proper divisors (4205077).

54665819 is a wasteful number, since it uses less digits than its factorization.

54665819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205076.

The product of its digits is 259200, while the sum is 44.

The square root of 54665819 is about 7393.6336804037. The cubic root of 54665819 is about 379.5234538748.

The spelling of 54665819 in words is "fifty-four million, six hundred sixty-five thousand, eight hundred nineteen".