130731816 has 64 divisors (see below), whose sum is σ = 348364800. Its totient is φ = 40787648.

The previous prime is 130731791. The next prime is 130731817. The reversal of 130731816 is 618137031.

It is not an unprimeable number, because it can be changed into a prime (130731817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23425 + ... + 28463.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^130731816 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 130731816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174182400).

130731816 is an abundant number, since it is smaller than the sum of its proper divisors (217632984).

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

130731816 is a wasteful number, since it uses less digits than its factorization.

130731816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118 (or 5114 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 130731816 is about 11433.8014675785. The cubic root of 130731816 is about 507.5284958964.

Adding to 130731816 its reverse (618137031), we get a palindrome (748868847).

The spelling of 130731816 in words is "one hundred thirty million, seven hundred thirty-one thousand, eight hundred sixteen".