130805081 has 4 divisors (see below), whose sum is σ = 142696464. Its totient is φ = 118913700.

The previous prime is 130805069. The next prime is 130805083. The reversal of 130805081 is 180508031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130805081 is a prime.

It is a super-2 number, since 2×130805081² = 34219938430833122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130805081.

It is not an unprimeable number, because it can be changed into a prime (130805083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5945675 + ... + 5945696.

It is an arithmetic number, because the mean of its divisors is an integer number (35674116).

Almost surely, 2^130805081 is an apocalyptic number.

130805081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130805081 is a deficient number, since it is larger than the sum of its proper divisors (11891383).

130805081 is a wasteful number, since it uses less digits than its factorization.

130805081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891382.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 130805081 is about 11437.0048963879. The cubic root of 130805081 is about 507.6232882540.

The spelling of 130805081 in words is "one hundred thirty million, eight hundred five thousand, eighty-one".