213534240555 has 16 divisors (see below), whose sum is σ = 348101102880. Its totient is φ = 111736155648.

The previous prime is 213534240533. The next prime is 213534240587. The reversal of 213534240555 is 555042435312.

It is not a de Polignac number, because 213534240555 - 2⁹ = 213534240043 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134297470 + ... + 134299059.

It is an arithmetic number, because the mean of its divisors is an integer number (21756318930).

Almost surely, 2^213534240555 is an apocalyptic number.

213534240555 is a deficient number, since it is larger than the sum of its proper divisors (134566862325).

213534240555 is a wasteful number, since it uses less digits than its factorization.

213534240555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268596590.

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 213534240555 its reverse (555042435312), we get a palindrome (768576675867).

The spelling of 213534240555 in words is "two hundred thirteen billion, five hundred thirty-four million, two hundred forty thousand, five hundred fifty-five".