5181540 has 144 divisors (see below), whose sum is σ = 18200448. Its totient is φ = 1078272.

The previous prime is 5181529. The next prime is 5181541. The reversal of 5181540 is 451815.

5181540 = T₅₅ + T₅₆ + ... + T₃₁₄.

It is a self number, because there is not a number n which added to its sum of digits gives 5181540.

It is not an unprimeable number, because it can be changed into a prime (5181541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70944 + ... + 71016.

It is an arithmetic number, because the mean of its divisors is an integer number (126392).

Almost surely, 2^5181540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5181540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9100224).

5181540 is an abundant number, since it is smaller than the sum of its proper divisors (13018908).

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

5181540 is a wasteful number, since it uses less digits than its factorization.

5181540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 5181540 is about 2276.2996287835. The cubic root of 5181540 is about 173.0425680719.

The spelling of 5181540 in words is "five million, one hundred eighty-one thousand, five hundred forty".