54185881 has 4 divisors (see below), whose sum is σ = 54531172. Its totient is φ = 53840592.

The previous prime is 54185869. The next prime is 54185933. The reversal of 54185881 is 18858145.

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 6451600 + 47734281 = 2540^2 + 6909^2 .

It is a cyclic number.

It is not a de Polignac number, because 54185881 - 2¹⁷ = 54054809 is a prime.

It is a super-2 number, since 2×54185881² = 5872219399492322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54185821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172410 + ... + 172723.

It is an arithmetic number, because the mean of its divisors is an integer number (13632793).

Almost surely, 2^54185881 is an apocalyptic number.

It is an amenable number.

54185881 is a deficient number, since it is larger than the sum of its proper divisors (345291).

54185881 is a wasteful number, since it uses less digits than its factorization.

54185881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345290.

The product of its digits is 51200, while the sum is 40.

The square root of 54185881 is about 7361.1059631009. The cubic root of 54185881 is about 378.4095134470.

The spelling of 54185881 in words is "fifty-four million, one hundred eighty-five thousand, eight hundred eighty-one".