130205540 has 12 divisors (see below), whose sum is σ = 273431676. Its totient is φ = 52082208.

The previous prime is 130205539. The next prime is 130205561. The reversal of 130205540 is 45502031.

It can be written as a sum of positive squares in 2 ways, for example, as 25020004 + 105185536 = 5002^2 + 10256^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6510277 = 130205540 / (1 + 3 + 0 + 2 + 0 + 5 + 5 + 4 + 0).

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, 3255119 + ... + 3255158.

It is an arithmetic number, because the mean of its divisors is an integer number (22785973).

Almost surely, 2^130205540 is an apocalyptic number.

130205540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130205540 is an abundant number, since it is smaller than the sum of its proper divisors (143226136).

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

130205540 is a wasteful number, since it uses less digits than its factorization.

130205540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510286 (or 6510284 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 130205540 is about 11410.7642163003. The cubic root of 130205540 is about 506.8465418201.

Adding to 130205540 its reverse (45502031), we get a palindrome (175707571).

The spelling of 130205540 in words is "one hundred thirty million, two hundred five thousand, five hundred forty".