215544530512423 has 32 divisors (see below), whose sum is σ = 248988095741952. Its totient is φ = 182776142498400.

The previous prime is 215544530512393. The next prime is 215544530512429. The reversal of 215544530512423 is 324215035445512.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215544530512423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215544530512429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295102890 + ... + 295832392.

It is an arithmetic number, because the mean of its divisors is an integer number (7780877991936).

Almost surely, 2^{215544530512423} is an apocalyptic number.

215544530512423 is a deficient number, since it is larger than the sum of its proper divisors (33443565229529).

215544530512423 is a wasteful number, since it uses less digits than its factorization.

215544530512423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730915.

The product of its (nonzero) digits is 2880000, while the sum is 46.

Adding to 215544530512423 its reverse (324215035445512), we get a palindrome (539759565957935).

The spelling of 215544530512423 in words is "two hundred fifteen trillion, five hundred forty-four billion, five hundred thirty million, five hundred twelve thousand, four hundred twenty-three".