281130266 has 4 divisors (see below), whose sum is σ = 421695402. Its totient is φ = 140565132.

The previous prime is 281130233. The next prime is 281130287. The reversal of 281130266 is 662031182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 278189041 + 2941225 = 16679^2 + 1715^2 .

It is a super-2 number, since 2×281130266² = 158068452922461512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70282565 + ... + 70282568.

Almost surely, 2^281130266 is an apocalyptic number.

281130266 is a deficient number, since it is larger than the sum of its proper divisors (140565136).

281130266 is a wasteful number, since it uses less digits than its factorization.

281130266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140565135.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 281130266 is about 16766.9396730590. The cubic root of 281130266 is about 655.0923599923.

The spelling of 281130266 in words is "two hundred eighty-one million, one hundred thirty thousand, two hundred sixty-six".