280087331 has 4 divisors (see below), whose sum is σ = 281343552. Its totient is φ = 278831112.

The previous prime is 280087273. The next prime is 280087343. The reversal of 280087331 is 133780082.

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

It is a cyclic number.

It is not a de Polignac number, because 280087331 - 2⁶ = 280087267 is a prime.

It is a super-2 number, since 2×280087331² = 156897825973407122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280087231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627776 + ... + 628221.

It is an arithmetic number, because the mean of its divisors is an integer number (70335888).

Almost surely, 2^280087331 is an apocalyptic number.

280087331 is a deficient number, since it is larger than the sum of its proper divisors (1256221).

280087331 is a wasteful number, since it uses less digits than its factorization.

280087331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256220.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 280087331 is about 16735.8098399809. The cubic root of 280087331 is about 654.2812705610.

The spelling of 280087331 in words is "two hundred eighty million, eighty-seven thousand, three hundred thirty-one".