213306541 has 4 divisors (see below), whose sum is σ = 243778912. Its totient is φ = 182834172.

The previous prime is 213306529. The next prime is 213306547. The reversal of 213306541 is 145603312.

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 213306541 - 2⁹ = 213306029 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 (213306547) 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, 15236175 + ... + 15236188.

It is an arithmetic number, because the mean of its divisors is an integer number (60944728).

Almost surely, 2^213306541 is an apocalyptic number.

It is an amenable number.

213306541 is a deficient number, since it is larger than the sum of its proper divisors (30472371).

213306541 is an equidigital number, since it uses as much as digits as its factorization.

213306541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30472370.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 213306541 is about 14605.0176651725. The cubic root of 213306541 is about 597.4956178084.

Adding to 213306541 its reverse (145603312), we get a palindrome (358909853).

The spelling of 213306541 in words is "two hundred thirteen million, three hundred six thousand, five hundred forty-one".