5205523231 has 4 divisors (see below), whose sum is σ = 5431850352. Its totient is φ = 4979196112.

The previous prime is 5205523223. The next prime is 5205523261. The reversal of 5205523231 is 1323255025.

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 5205523231 - 2³ = 5205523223 is a prime.

It is a super-2 number, since 2×5205523231² = 54194944216961358722, which contains 22 as substring.

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 5205523231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205523261) 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, 113163526 + ... + 113163571.

It is an arithmetic number, because the mean of its divisors is an integer number (1357962588).

Almost surely, 2^5205523231 is an apocalyptic number.

5205523231 is a deficient number, since it is larger than the sum of its proper divisors (226327121).

5205523231 is a wasteful number, since it uses less digits than its factorization.

5205523231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226327120.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 5205523231 is about 72149.3120618624. The cubic root of 5205523231 is about 1733.0913832116.

Adding to 5205523231 its reverse (1323255025), we get a palindrome (6528778256).

The spelling of 5205523231 in words is "five billion, two hundred five million, five hundred twenty-three thousand, two hundred thirty-one".