213221541 has 8 divisors (see below), whose sum is σ = 306164320. Its totient is φ = 131213232.

The previous prime is 213221527. The next prime is 213221551. The reversal of 213221541 is 145122312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213221541 - 2¹³ = 213213349 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 (213221551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2733571 + ... + 2733648.

It is an arithmetic number, because the mean of its divisors is an integer number (38270540).

Almost surely, 2^213221541 is an apocalyptic number.

It is an amenable number.

213221541 is a deficient number, since it is larger than the sum of its proper divisors (92942779).

213221541 is a wasteful number, since it uses less digits than its factorization.

213221541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5467235.

The product of its digits is 480, while the sum is 21.

The square root of 213221541 is about 14602.1074163971. The cubic root of 213221541 is about 597.4162424099.

Adding to 213221541 its reverse (145122312), we get a palindrome (358343853).

The spelling of 213221541 in words is "two hundred thirteen million, two hundred twenty-one thousand, five hundred forty-one".