5240135231 has 4 divisors (see below), whose sum is σ = 5244400200. Its totient is φ = 5235870264.

The previous prime is 5240135213. The next prime is 5240135237. The reversal of 5240135231 is 1325310425.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5240135231 is a prime.

It is a super-2 number, since 2×5240135231² = 54918034478334846722, 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 5240135231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5240135237) 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, 2130641 + ... + 2133098.

It is an arithmetic number, because the mean of its divisors is an integer number (1311100050).

Almost surely, 2^5240135231 is an apocalyptic number.

5240135231 is a deficient number, since it is larger than the sum of its proper divisors (4264969).

5240135231 is a wasteful number, since it uses less digits than its factorization.

5240135231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264968.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 5240135231 is about 72388.7783499625. The cubic root of 5240135231 is about 1736.9240621425.

Adding to 5240135231 its reverse (1325310425), we get a palindrome (6565445656).

The spelling of 5240135231 in words is "five billion, two hundred forty million, one hundred thirty-five thousand, two hundred thirty-one".