280213 has 4 divisors (see below), whose sum is σ = 283840. Its totient is φ = 276588.

The previous prime is 280207. The next prime is 280219. The reversal of 280213 is 312082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312082 = 2 ⋅156041.

It is an interprime number because it is at equal distance from previous prime (280207) and next prime (280219).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280219) 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, 1695 + ... + 1852.

It is an arithmetic number, because the mean of its divisors is an integer number (70960).

2²⁸⁰²¹³ is an apocalyptic number.

It is an amenable number.

280213 is a deficient number, since it is larger than the sum of its proper divisors (3627).

280213 is an equidigital number, since it uses as much as digits as its factorization.

280213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 280213 is about 529.3514900329. The cubic root of 280213 is about 65.4379109782.

Adding to 280213 its reverse (312082), we get a palindrome (592295).

The spelling of 280213 in words is "two hundred eighty thousand, two hundred thirteen".