280965155 has 8 divisors (see below), whose sum is σ = 337660272. Its totient is φ = 224437408.

The previous prime is 280965149. The next prime is 280965173. The reversal of 280965155 is 551569082.

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

It is a cyclic number.

It is not a de Polignac number, because 280965155 - 2²⁰ = 279916579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38117 + ... + 44886.

It is an arithmetic number, because the mean of its divisors is an integer number (42207534).

Almost surely, 2^280965155 is an apocalyptic number.

280965155 is a deficient number, since it is larger than the sum of its proper divisors (56695117).

280965155 is an equidigital number, since it uses as much as digits as its factorization.

280965155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83685.

The product of its (nonzero) digits is 108000, while the sum is 41.

The square root of 280965155 is about 16762.0152428042. The cubic root of 280965155 is about 654.9640871478.

The spelling of 280965155 in words is "two hundred eighty million, nine hundred sixty-five thousand, one hundred fifty-five".