5131540 has 12 divisors (see below), whose sum is σ = 10776276. Its totient is φ = 2052608.

The previous prime is 5131517. The next prime is 5131541. The reversal of 5131540 is 451315.

It can be written as a sum of positive squares in 2 ways, for example, as 1179396 + 3952144 = 1086^2 + 1988^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5131541) 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, 128269 + ... + 128308.

It is an arithmetic number, because the mean of its divisors is an integer number (898023).

Almost surely, 2^5131540 is an apocalyptic number.

It is an amenable number.

5131540 is an abundant number, since it is smaller than the sum of its proper divisors (5644736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5131540 is a wasteful number, since it uses less digits than its factorization.

5131540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256586 (or 256584 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 5131540 is about 2265.2902683762. The cubic root of 5131540 is about 172.4841685394.

Adding to 5131540 its reverse (451315), we get a palindrome (5582855).

It can be divided in two parts, 5131 and 540, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 5131540 in words is "five million, one hundred thirty-one thousand, five hundred forty".