280065213 has 12 divisors (see below), whose sum is σ = 411171228. Its totient is φ = 183648960.

The previous prime is 280065211. The next prime is 280065241. The reversal of 280065213 is 312560082.

280065213 is a `hidden beast` number, since 2 + 8 + 0 + 0 + 652 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 259435449 = 4542^2 + 16107^2 .

It is not a de Polignac number, because 280065213 - 2¹ = 280065211 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280065211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254520 + ... + 255617.

It is an arithmetic number, because the mean of its divisors is an integer number (34264269).

Almost surely, 2^280065213 is an apocalyptic number.

It is an amenable number.

280065213 is a deficient number, since it is larger than the sum of its proper divisors (131106015).

280065213 is a wasteful number, since it uses less digits than its factorization.

280065213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510204 (or 510201 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 280065213 is about 16735.1490283176. The cubic root of 280065213 is about 654.2640476303.

The spelling of 280065213 in words is "two hundred eighty million, sixty-five thousand, two hundred thirteen".