240213 has 4 divisors (see below), whose sum is σ = 320288. Its totient is φ = 160140.

The previous prime is 240209. The next prime is 240257. The reversal of 240213 is 312042.

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.

It is not a de Polignac number, because 240213 - 2² = 240209 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 4.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 240213.

It is not an unprimeable number, because it can be changed into a prime (240203) 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, 40033 + ... + 40038.

It is an arithmetic number, because the mean of its divisors is an integer number (80072).

2²⁴⁰²¹³ is an apocalyptic number.

It is an amenable number.

240213 is a deficient number, since it is larger than the sum of its proper divisors (80075).

240213 is an equidigital number, since it uses as much as digits as its factorization.

240213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80074.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 240213 is about 490.1152925588. The cubic root of 240213 is about 62.1630291420.

Adding to 240213 its reverse (312042), we get a palindrome (552255).

It can be divided in two parts, 2402 and 13, that added together give a triangular number (2415 = T₆₉).

The spelling of 240213 in words is "two hundred forty thousand, two hundred thirteen".