280228171 has 4 divisors (see below), whose sum is σ = 281906352. Its totient is φ = 278549992.

The previous prime is 280228139. The next prime is 280228213. The reversal of 280228171 is 171822082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171822082 = 2 ⋅85911041.

It is a cyclic number.

It is not a de Polignac number, because 280228171 - 2⁵ = 280228139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280228271) 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, 838840 + ... + 839173.

It is an arithmetic number, because the mean of its divisors is an integer number (70476588).

Almost surely, 2^280228171 is an apocalyptic number.

280228171 is a deficient number, since it is larger than the sum of its proper divisors (1678181).

280228171 is a wasteful number, since it uses less digits than its factorization.

280228171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678180.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 280228171 is about 16740.0170549495. The cubic root of 280228171 is about 654.3909191393.

The spelling of 280228171 in words is "two hundred eighty million, two hundred twenty-eight thousand, one hundred seventy-one".