215256012066258 has 32 divisors (see below), whose sum is σ = 445086370713600. Its totient is φ = 69330101070480.

The previous prime is 215256012066253. The next prime is 215256012066281. The reversal of 215256012066258 is 852660210652512.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215256012066258.

It is not an unprimeable number, because it can be changed into a prime (215256012066253) 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, 894230808 + ... + 894471491.

It is an arithmetic number, because the mean of its divisors is an integer number (13908949084800).

Almost surely, 2^{215256012066258} is an apocalyptic number.

215256012066258 is an abundant number, since it is smaller than the sum of its proper divisors (229830358647342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215256012066258 is a wasteful number, since it uses less digits than its factorization.

215256012066258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788702982.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 215256012066258 in words is "two hundred fifteen trillion, two hundred fifty-six billion, twelve million, sixty-six thousand, two hundred fifty-eight".