210240213 has 4 divisors (see below), whose sum is σ = 280320288. Its totient is φ = 140160140.

The previous prime is 210240211. The next prime is 210240223. The reversal of 210240213 is 312042012.

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 a cyclic number.

It is not a de Polignac number, because 210240213 - 2¹ = 210240211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210240192 and 210240201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210240211) 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, 35040033 + ... + 35040038.

It is an arithmetic number, because the mean of its divisors is an integer number (70080072).

Almost surely, 2^210240213 is an apocalyptic number.

It is an amenable number.

210240213 is a deficient number, since it is larger than the sum of its proper divisors (70080075).

210240213 is an equidigital number, since it uses as much as digits as its factorization.

210240213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70080074.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 210240213 is about 14499.6625133139. The cubic root of 210240213 is about 594.6187450002.

Adding to 210240213 its reverse (312042012), we get a palindrome (522282225).

The spelling of 210240213 in words is "two hundred ten million, two hundred forty thousand, two hundred thirteen".