5131320040 has 128 divisors (see below), whose sum is σ = 14422302720. Its totient is φ = 1596268800.

The previous prime is 5131320031. The next prime is 5131320041. The reversal of 5131320040 is 400231315.

It is not an unprimeable number, because it can be changed into a prime (5131320041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1979145 + ... + 1981735.

It is an arithmetic number, because the mean of its divisors is an integer number (112674240).

Almost surely, 2^5131320040 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 5131320040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7211151360).

5131320040 is an abundant number, since it is smaller than the sum of its proper divisors (9290982680).

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

5131320040 is a wasteful number, since it uses less digits than its factorization.

5131320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263 (or 3259 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 5131320040 is about 71633.2327903746. The cubic root of 5131320040 is about 1724.8170403167.

Adding to 5131320040 its reverse (400231315), we get a palindrome (5531551355).

The spelling of 5131320040 in words is "five billion, one hundred thirty-one million, three hundred twenty thousand, forty".