213243541 has 12 divisors (see below), whose sum is σ = 250019328. Its totient is φ = 181335672.

The previous prime is 213243533. The next prime is 213243553. The reversal of 213243541 is 145342312.

It is not a de Polignac number, because 213243541 - 2³ = 213243533 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 (213243571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10911 + ... + 23356.

It is an arithmetic number, because the mean of its divisors is an integer number (20834944).

Almost surely, 2^213243541 is an apocalyptic number.

It is an amenable number.

213243541 is a deficient number, since it is larger than the sum of its proper divisors (36775787).

213243541 is a wasteful number, since it uses less digits than its factorization.

213243541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34408 (or 34401 counting only the distinct ones).

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

The square root of 213243541 is about 14602.8607128877. The cubic root of 213243541 is about 597.4367886538.

Adding to 213243541 its reverse (145342312), we get a palindrome (358585853).

The spelling of 213243541 in words is "two hundred thirteen million, two hundred forty-three thousand, five hundred forty-one".