213242541 has 16 divisors (see below), whose sum is σ = 287273280. Its totient is φ = 140693760.

The previous prime is 213242537. The next prime is 213242551. The reversal of 213242541 is 145242312.

It is not a de Polignac number, because 213242541 - 2² = 213242537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213242501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179971 + ... + 181151.

It is an arithmetic number, because the mean of its divisors is an integer number (17954580).

Almost surely, 2^213242541 is an apocalyptic number.

It is an amenable number.

213242541 is a deficient number, since it is larger than the sum of its proper divisors (74030739).

213242541 is a wasteful number, since it uses less digits than its factorization.

213242541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its digits is 1920, while the sum is 24.

The square root of 213242541 is about 14602.8264729812. The cubic root of 213242541 is about 597.4358547643.

Adding to 213242541 its reverse (145242312), we get a palindrome (358484853).

The spelling of 213242541 in words is "two hundred thirteen million, two hundred forty-two thousand, five hundred forty-one".