213518241 has 8 divisors (see below), whose sum is σ = 316323360. Its totient is φ = 142345476.

The previous prime is 213518167. The next prime is 213518251. The reversal of 213518241 is 142815312.

It is not a de Polignac number, because 213518241 - 2²² = 209323937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7908083 = 213518241 / (2 + 1 + 3 + 5 + 1 + 8 + 2 + 4 + 1).

It is not an unprimeable number, because it can be changed into a prime (213518251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3954015 + ... + 3954068.

It is an arithmetic number, because the mean of its divisors is an integer number (39540420).

Almost surely, 2^213518241 is an apocalyptic number.

It is an amenable number.

213518241 is a deficient number, since it is larger than the sum of its proper divisors (102805119).

213518241 is an equidigital number, since it uses as much as digits as its factorization.

213518241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908092 (or 7908086 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 213518241 is about 14612.2633770405. The cubic root of 213518241 is about 597.6932176241.

It can be divided in two parts, 21351 and 8241, that added together give a palindrome (29592).

The spelling of 213518241 in words is "two hundred thirteen million, five hundred eighteen thousand, two hundred forty-one".