5231809 has 4 divisors (see below), whose sum is σ = 5707440. Its totient is φ = 4756180.

The previous prime is 5231797. The next prime is 5231827. The reversal of 5231809 is 9081325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5231809 - 2⁹ = 5231297 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (5231309) 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, 237799 + ... + 237820.

It is an arithmetic number, because the mean of its divisors is an integer number (1426860).

Almost surely, 2^5231809 is an apocalyptic number.

It is an amenable number.

5231809 is a deficient number, since it is larger than the sum of its proper divisors (475631).

5231809 is a wasteful number, since it uses less digits than its factorization.

5231809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475630.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 5231809 is about 2287.3148012462. The cubic root of 5231809 is about 173.6003621680.

It can be divided in two parts, 523 and 1809, that added together give a palindrome (2332).

The spelling of 5231809 in words is "five million, two hundred thirty-one thousand, eight hundred nine".