54685857 has 16 divisors (see below), whose sum is σ = 77000000. Its totient is φ = 34426944.

The previous prime is 54685849. The next prime is 54685859. The reversal of 54685857 is 75858645.

It is not a de Polignac number, because 54685857 - 2³ = 54685849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54685859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18519 + ... + 21267.

It is an arithmetic number, because the mean of its divisors is an integer number (4812500).

Almost surely, 2^54685857 is an apocalyptic number.

54685857 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

54685857 is a deficient number, since it is larger than the sum of its proper divisors (22314143).

54685857 is a wasteful number, since it uses less digits than its factorization.

54685857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120.

The product of its digits is 1344000, while the sum is 48.

The square root of 54685857 is about 7394.9886409649. The cubic root of 54685857 is about 379.5698202154.

It can be divided in two parts, 5468 and 5857, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 54685857 in words is "fifty-four million, six hundred eighty-five thousand, eight hundred fifty-seven".