218075213 has 4 divisors (see below), whose sum is σ = 227556768. Its totient is φ = 208593660.

The previous prime is 218075203. The next prime is 218075219. The reversal of 218075213 is 312570812.

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 218075213 - 2⁶ = 218075149 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 (218075219) 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, 4740743 + ... + 4740788.

It is an arithmetic number, because the mean of its divisors is an integer number (56889192).

Almost surely, 2^218075213 is an apocalyptic number.

218075213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

218075213 is a deficient number, since it is larger than the sum of its proper divisors (9481555).

218075213 is an equidigital number, since it uses as much as digits as its factorization.

218075213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481554.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 218075213 is about 14767.3698741516. The cubic root of 218075213 is about 601.9153725919.

The spelling of 218075213 in words is "two hundred eighteen million, seventy-five thousand, two hundred thirteen".