280513223 has 4 divisors (see below), whose sum is σ = 280546728. Its totient is φ = 280479720.

The previous prime is 280513217. The next prime is 280513237. The reversal of 280513223 is 322315082.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 280513223 - 2⁶ = 280513159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280513192 and 280513201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280513423) 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, 7865 + ... + 24957.

It is an arithmetic number, because the mean of its divisors is an integer number (70136682).

Almost surely, 2^280513223 is an apocalyptic number.

280513223 is a deficient number, since it is larger than the sum of its proper divisors (33505).

280513223 is a wasteful number, since it uses less digits than its factorization.

280513223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33504.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 280513223 is about 16748.5289801821. The cubic root of 280513223 is about 654.6127291338.

The spelling of 280513223 in words is "two hundred eighty million, five hundred thirteen thousand, two hundred twenty-three".