130440581 has 2 divisors, whose sum is σ = 130440582. Its totient is φ = 130440580.

The previous prime is 130440551. The next prime is 130440593. The reversal of 130440581 is 185044031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69989956 + 60450625 = 8366^2 + 7775^2 .

It is a cyclic number.

It is not a de Polignac number, because 130440581 - 2¹⁴ = 130424197 is a prime.

It is a super-2 number, since 2×130440581² = 34029490343235122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 130440581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130440511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65220290 + 65220291.

It is an arithmetic number, because the mean of its divisors is an integer number (65220291).

Almost surely, 2^130440581 is an apocalyptic number.

It is an amenable number.

130440581 is a deficient number, since it is larger than the sum of its proper divisors (1).

130440581 is an equidigital number, since it uses as much as digits as its factorization.

130440581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 130440581 is about 11421.0586637141. The cubic root of 130440581 is about 507.1513371137.

The spelling of 130440581 in words is "one hundred thirty million, four hundred forty thousand, five hundred eighty-one".