53518139 has 2 divisors, whose sum is σ = 53518140. Its totient is φ = 53518138.

The previous prime is 53518099. The next prime is 53518141. The reversal of 53518139 is 93181535.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53518139 - 2¹⁶ = 53452603 is a prime.

Together with 53518141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53518099 and 53518108.

It is not a weakly prime, because it can be changed into another prime (53518039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26759069 + 26759070.

It is an arithmetic number, because the mean of its divisors is an integer number (26759070).

Almost surely, 2^53518139 is an apocalyptic number.

53518139 is a deficient number, since it is larger than the sum of its proper divisors (1).

53518139 is an equidigital number, since it uses as much as digits as its factorization.

53518139 is an odious number, because the sum of its binary digits is odd.

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

The square root of 53518139 is about 7315.6092705939. The cubic root of 53518139 is about 376.8486823166.

The spelling of 53518139 in words is "fifty-three million, five hundred eighteen thousand, one hundred thirty-nine".