54857057 has 4 divisors (see below), whose sum is σ = 56195076. Its totient is φ = 53519040.

The previous prime is 54857041. The next prime is 54857059. The reversal of 54857057 is 75075845.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25361296 + 29495761 = 5036^2 + 5431^2 .

It is a cyclic number.

It is not a de Polignac number, because 54857057 - 2⁴ = 54857041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1337977 = 54857057 / (5 + 4 + 8 + 5 + 7 + 0 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54857059) 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, 668948 + ... + 669029.

It is an arithmetic number, because the mean of its divisors is an integer number (14048769).

Almost surely, 2^54857057 is an apocalyptic number.

It is an amenable number.

54857057 is a deficient number, since it is larger than the sum of its proper divisors (1338019).

54857057 is a wasteful number, since it uses less digits than its factorization.

54857057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338018.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 54857057 is about 7406.5550021586. Note that the first 3 decimals coincide. The cubic root of 54857057 is about 379.9655024085.

The spelling of 54857057 in words is "fifty-four million, eight hundred fifty-seven thousand, fifty-seven".