54871685 has 12 divisors (see below), whose sum is σ = 72377004. Its totient is φ = 39906240.

The previous prime is 54871681. The next prime is 54871693. The reversal of 54871685 is 58617845.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38217124 + 16654561 = 6182^2 + 4081^2 .

It is not a de Polignac number, because 54871685 - 2² = 54871681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54871681) 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 11 ways as a sum of consecutive naturals, for example, 44744 + ... + 45953.

It is an arithmetic number, because the mean of its divisors is an integer number (6031417).

Almost surely, 2^54871685 is an apocalyptic number.

54871685 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54871685 is a deficient number, since it is larger than the sum of its proper divisors (17505319).

54871685 is a wasteful number, since it uses less digits than its factorization.

54871685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90724 (or 90713 counting only the distinct ones).

The product of its digits is 268800, while the sum is 44.

The square root of 54871685 is about 7407.5424399729. The cubic root of 54871685 is about 379.9992728518. Note that the first 3 decimals are identical.

The spelling of 54871685 in words is "fifty-four million, eight hundred seventy-one thousand, six hundred eighty-five".