130231540 has 12 divisors (see below), whose sum is σ = 273486276. Its totient is φ = 52092608.

The previous prime is 130231531. The next prime is 130231553. The reversal of 130231540 is 45132031.

It can be written as a sum of positive squares in 2 ways, for example, as 34152336 + 96079204 = 5844^2 + 9802^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3255769 + ... + 3255808.

It is an arithmetic number, because the mean of its divisors is an integer number (22790523).

Almost surely, 2^130231540 is an apocalyptic number.

130231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130231540 is an abundant number, since it is smaller than the sum of its proper divisors (143254736).

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

130231540 is a wasteful number, since it uses less digits than its factorization.

130231540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511586 (or 6511584 counting only the distinct ones).

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

The square root of 130231540 is about 11411.9034345722. The cubic root of 130231540 is about 506.8802760044.

Adding to 130231540 its reverse (45132031), we get a palindrome (175363571).

The spelling of 130231540 in words is "one hundred thirty million, two hundred thirty-one thousand, five hundred forty".