53206139 has 8 divisors (see below), whose sum is σ = 61148160. Its totient is φ = 45349416.

The previous prime is 53206133. The next prime is 53206157. The reversal of 53206139 is 93160235.

53206139 is nontrivially palindromic in base 6.

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

It is not a de Polignac number, because 53206139 - 2²⁴ = 36428923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53206133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19979 + ... + 22484.

It is an arithmetic number, because the mean of its divisors is an integer number (7643520).

Almost surely, 2^53206139 is an apocalyptic number.

53206139 is a deficient number, since it is larger than the sum of its proper divisors (7942021).

53206139 is a wasteful number, since it uses less digits than its factorization.

53206139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42649.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 53206139 is about 7294.2538343548. The cubic root of 53206139 is about 376.1149372288.

The spelling of 53206139 in words is "fifty-three million, two hundred six thousand, one hundred thirty-nine".