53540239 has 4 divisors (see below), whose sum is σ = 53668440. Its totient is φ = 53412040.

The previous prime is 53540237. The next prime is 53540257. The reversal of 53540239 is 93204535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53540239 - 2¹ = 53540237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53540239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53540231) 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, 63472 + ... + 64309.

It is an arithmetic number, because the mean of its divisors is an integer number (13417110).

Almost surely, 2^53540239 is an apocalyptic number.

53540239 is a deficient number, since it is larger than the sum of its proper divisors (128201).

53540239 is a wasteful number, since it uses less digits than its factorization.

53540239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128200.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 53540239 is about 7317.1195835520. The cubic root of 53540239 is about 376.9005476586.

The spelling of 53540239 in words is "fifty-three million, five hundred forty thousand, two hundred thirty-nine".