213440142541 has 8 divisors (see below), whose sum is σ = 214272988344. Its totient is φ = 212607816960.

The previous prime is 213440142511. The next prime is 213440142557. The reversal of 213440142541 is 145241044312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10058084100 + 203382058441 = 100290^2 + 450979^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 213440142541 - 2¹⁷ = 213440011469 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 (213440142511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702481 + ... + 959353.

It is an arithmetic number, because the mean of its divisors is an integer number (26784123543).

Almost surely, 2^213440142541 is an apocalyptic number.

It is an amenable number.

213440142541 is a deficient number, since it is larger than the sum of its proper divisors (832845803).

213440142541 is a wasteful number, since it uses less digits than its factorization.

213440142541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260111.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 213440142541 its reverse (145241044312), we get a palindrome (358681186853).

The spelling of 213440142541 in words is "two hundred thirteen billion, four hundred forty million, one hundred forty-two thousand, five hundred forty-one".