215442523205 has 16 divisors (see below), whose sum is σ = 318192034944. Its totient is φ = 136368014400.

The previous prime is 215442523181. The next prime is 215442523207. The reversal of 215442523205 is 502325244512.

It is a happy number.

It is not a de Polignac number, because 215442523205 - 2¹⁴ = 215442506821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215442523207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236749571 + ... + 236750480.

It is an arithmetic number, because the mean of its divisors is an integer number (19887002184).

Almost surely, 2^215442523205 is an apocalyptic number.

It is an amenable number.

215442523205 is a deficient number, since it is larger than the sum of its proper divisors (102749511739).

215442523205 is a wasteful number, since it uses less digits than its factorization.

215442523205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473500076.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 215442523205 its reverse (502325244512), we get a palindrome (717767767717).

The spelling of 215442523205 in words is "two hundred fifteen billion, four hundred forty-two million, five hundred twenty-three thousand, two hundred five".