53581139 has 4 divisors (see below), whose sum is σ = 54827256. Its totient is φ = 52335024.

The previous prime is 53581079. The next prime is 53581141. The reversal of 53581139 is 93118535.

53581139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93118535 = 5 ⋅18623707.

It is a cyclic number.

It is not a de Polignac number, because 53581139 - 2⁸ = 53580883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53581099 and 53581108.

It is not an unprimeable number, because it can be changed into a prime (53581169) 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 3 ways as a sum of consecutive naturals, for example, 622994 + ... + 623079.

It is an arithmetic number, because the mean of its divisors is an integer number (13706814).

Almost surely, 2^53581139 is an apocalyptic number.

53581139 is a deficient number, since it is larger than the sum of its proper divisors (1246117).

53581139 is a wasteful number, since it uses less digits than its factorization.

53581139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246116.

The product of its digits is 16200, while the sum is 35.

The square root of 53581139 is about 7319.9138656134. The cubic root of 53581139 is about 376.9964961083.

The spelling of 53581139 in words is "fifty-three million, five hundred eighty-one thousand, one hundred thirty-nine".