280513001 has 4 divisors (see below), whose sum is σ = 280547652. Its totient is φ = 280478352.

The previous prime is 280512997. The next prime is 280513003. The reversal of 280513001 is 100315082.

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 can be written as a sum of positive squares in 2 ways, for example, as 219750976 + 60762025 = 14824^2 + 7795^2 .

It is a cyclic number.

It is not a de Polignac number, because 280513001 - 2² = 280512997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280513003) 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, 2015 + ... + 23771.

It is an arithmetic number, because the mean of its divisors is an integer number (70136913).

Almost surely, 2^280513001 is an apocalyptic number.

It is an amenable number.

280513001 is a deficient number, since it is larger than the sum of its proper divisors (34651).

280513001 is a wasteful number, since it uses less digits than its factorization.

280513001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34650.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 280513001 is about 16748.5223527331. The cubic root of 280513001 is about 654.6125564455.

Adding to 280513001 its reverse (100315082), we get a palindrome (380828083).

The spelling of 280513001 in words is "two hundred eighty million, five hundred thirteen thousand, one".