281130905 has 8 divisors (see below), whose sum is σ = 368025984. Its totient is φ = 204458800.

The previous prime is 281130893. The next prime is 281130907. The reversal of 281130905 is 509031182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 281130905 - 2⁶ = 281130841 is a prime.

It is a super-2 number, since 2×281130905² = 158069171492238050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281130907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555681 + ... + 2555790.

It is an arithmetic number, because the mean of its divisors is an integer number (46003248).

Almost surely, 2^281130905 is an apocalyptic number.

It is an amenable number.

281130905 is a deficient number, since it is larger than the sum of its proper divisors (86895079).

281130905 is a wasteful number, since it uses less digits than its factorization.

281130905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111487.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 281130905 is about 16766.9587284039. The cubic root of 281130905 is about 655.0928563265.

The spelling of 281130905 in words is "two hundred eighty-one million, one hundred thirty thousand, nine hundred five".