53558243 has 4 divisors (see below), whose sum is σ = 53730768. Its totient is φ = 53385720.

The previous prime is 53558231. The next prime is 53558251. The reversal of 53558243 is 34285535.

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 53558243 - 2²⁴ = 36781027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53558213) 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, 85796 + ... + 86417.

It is an arithmetic number, because the mean of its divisors is an integer number (13432692).

Almost surely, 2^53558243 is an apocalyptic number.

53558243 is a deficient number, since it is larger than the sum of its proper divisors (172525).

53558243 is a wasteful number, since it uses less digits than its factorization.

53558243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172524.

The product of its digits is 72000, while the sum is 35.

The square root of 53558243 is about 7318.3497456735. The cubic root of 53558243 is about 376.9427897624.

The spelling of 53558243 in words is "fifty-three million, five hundred fifty-eight thousand, two hundred forty-three".