54181985 has 36 divisors (see below), whose sum is σ = 77902356. Its totient is φ = 35935680.

The previous prime is 54181961. The next prime is 54181999. The reversal of 54181985 is 58918145.

It can be written as a sum of positive squares in 2 ways, for example, as 13337104 + 40844881 = 3652^2 + 6391^2 .

It is not a de Polignac number, because 54181985 - 2⁶ = 54181921 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 652754 + ... + 652836.

Almost surely, 2^54181985 is an apocalyptic number.

54181985 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54181985 is a deficient number, since it is larger than the sum of its proper divisors (23720371).

54181985 is a wasteful number, since it uses less digits than its factorization.

54181985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 112 counting only the distinct ones).

The product of its digits is 57600, while the sum is 41.

The square root of 54181985 is about 7360.8413241966. The cubic root of 54181985 is about 378.4004439331.

The spelling of 54181985 in words is "fifty-four million, one hundred eighty-one thousand, nine hundred eighty-five".