5231591 has 4 divisors (see below), whose sum is σ = 5400384. Its totient is φ = 5062800.

The previous prime is 5231581. The next prime is 5231599. The reversal of 5231591 is 1951325.

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 5231591 - 2¹⁴ = 5215207 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 5231591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5231599) 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, 84350 + ... + 84411.

It is an arithmetic number, because the mean of its divisors is an integer number (1350096).

Almost surely, 2^5231591 is an apocalyptic number.

5231591 is a deficient number, since it is larger than the sum of its proper divisors (168793).

5231591 is a wasteful number, since it uses less digits than its factorization.

5231591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168792.

The product of its digits is 1350, while the sum is 26.

The square root of 5231591 is about 2287.2671466184. The cubic root of 5231591 is about 173.5979509304.

The spelling of 5231591 in words is "five million, two hundred thirty-one thousand, five hundred ninety-one".