213542442321 has 8 divisors (see below), whose sum is σ = 306625045440. Its totient is φ = 131410733712.

The previous prime is 213542442263. The next prime is 213542442341. The reversal of 213542442321 is 123244245312.

It is a happy number.

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

It is not a de Polignac number, because 213542442321 - 2²⁷ = 213408224593 is a prime.

It is a super-2 number, since 2×213542442321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213542442341) 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, 2737723581 + ... + 2737723658.

It is an arithmetic number, because the mean of its divisors is an integer number (38328130680).

Almost surely, 2^213542442321 is an apocalyptic number.

It is an amenable number.

213542442321 is a deficient number, since it is larger than the sum of its proper divisors (93082603119).

213542442321 is a wasteful number, since it uses less digits than its factorization.

213542442321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475447255.

The product of its digits is 46080, while the sum is 33.

Adding to 213542442321 its reverse (123244245312), we get a palindrome (336786687633).

The spelling of 213542442321 in words is "two hundred thirteen billion, five hundred forty-two million, four hundred forty-two thousand, three hundred twenty-one".