54186139 has 8 divisors (see below), whose sum is σ = 62035200. Its totient is φ = 46364136.

The previous prime is 54186113. The next prime is 54186169. The reversal of 54186139 is 93168145.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 54186139 - 2⁵ = 54186107 is a prime.

It is a super-2 number, since 2×54186139² = 5872275319454642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54186098 and 54186107.

It is not an unprimeable number, because it can be changed into a prime (54186169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2269 + ... + 10654.

It is an arithmetic number, because the mean of its divisors is an integer number (7754400).

Almost surely, 2^54186139 is an apocalyptic number.

54186139 is a deficient number, since it is larger than the sum of its proper divisors (7849061).

54186139 is a wasteful number, since it uses less digits than its factorization.

54186139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13529.

The product of its digits is 25920, while the sum is 37.

The square root of 54186139 is about 7361.1234876206. The cubic root of 54186139 is about 378.4101140309.

The spelling of 54186139 in words is "fifty-four million, one hundred eighty-six thousand, one hundred thirty-nine".