54857139 has 16 divisors (see below), whose sum is σ = 78188544. Its totient is φ = 34126400.

The previous prime is 54857119. The next prime is 54857171. The reversal of 54857139 is 93175845.

54857139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 54857139 - 2¹¹ = 54855091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54857139.

It is not an unprimeable number, because it can be changed into a prime (54857119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6867 + ... + 12524.

It is an arithmetic number, because the mean of its divisors is an integer number (4886784).

Almost surely, 2^54857139 is an apocalyptic number.

54857139 is a deficient number, since it is larger than the sum of its proper divisors (23331405).

54857139 is a wasteful number, since it uses less digits than its factorization.

54857139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19458.

The product of its digits is 151200, while the sum is 42.

The square root of 54857139 is about 7406.5605377935. The cubic root of 54857139 is about 379.9656917318.

The spelling of 54857139 in words is "fifty-four million, eight hundred fifty-seven thousand, one hundred thirty-nine".