215323555205 has 16 divisors (see below), whose sum is σ = 296713800000. Its totient is φ = 148356898560.

The previous prime is 215323555201. The next prime is 215323555207. The reversal of 215323555205 is 502555323512.

It is not a de Polignac number, because 215323555205 - 2² = 215323555201 is a prime.

It is a super-2 number, since 2×215323555205² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215323555201) 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, 103024580 + ... + 103026669.

It is an arithmetic number, because the mean of its divisors is an integer number (18544612500).

Almost surely, 2^215323555205 is an apocalyptic number.

It is an amenable number.

215323555205 is a deficient number, since it is larger than the sum of its proper divisors (81390244795).

215323555205 is a wasteful number, since it uses less digits than its factorization.

215323555205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206051284.

The product of its (nonzero) digits is 225000, while the sum is 38.

Adding to 215323555205 its reverse (502555323512), we get a palindrome (717878878717).

The spelling of 215323555205 in words is "two hundred fifteen billion, three hundred twenty-three million, five hundred fifty-five thousand, two hundred five".