213442513 has 4 divisors (see below), whose sum is σ = 213685668. Its totient is φ = 213199360.

The previous prime is 213442511. The next prime is 213442519. The reversal of 213442513 is 315244312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15421329 + 198021184 = 3927^2 + 14072^2 .

It is a cyclic number.

It is not a de Polignac number, because 213442513 - 2¹ = 213442511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213442511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120256 + ... + 122017.

It is an arithmetic number, because the mean of its divisors is an integer number (53421417).

Almost surely, 2^213442513 is an apocalyptic number.

It is an amenable number.

213442513 is a deficient number, since it is larger than the sum of its proper divisors (243155).

213442513 is an equidigital number, since it uses as much as digits as its factorization.

213442513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243154.

The product of its digits is 2880, while the sum is 25.

The square root of 213442513 is about 14609.6718991222. The cubic root of 213442513 is about 597.6225484644.

Adding to 213442513 its reverse (315244312), we get a palindrome (528686825).

It can be divided in two parts, 2134425 and 13, that multiplied together give a triangular number (27747525 = T₇₄₄₉).

The spelling of 213442513 in words is "two hundred thirteen million, four hundred forty-two thousand, five hundred thirteen".