215500448905 has 24 divisors (see below), whose sum is σ = 313900218432. Its totient is φ = 141346874592.

The previous prime is 215500448899. The next prime is 215500448923. The reversal of 215500448905 is 509844005512.

It is not a de Polignac number, because 215500448905 - 2³¹ = 213352965257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19115967 + ... + 19127236.

It is an arithmetic number, because the mean of its divisors is an integer number (13079175768).

Almost surely, 2^215500448905 is an apocalyptic number.

It is an amenable number.

215500448905 is a deficient number, since it is larger than the sum of its proper divisors (98399769527).

215500448905 is a wasteful number, since it uses less digits than its factorization.

215500448905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38243245 (or 38243238 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 215500448905 in words is "two hundred fifteen billion, five hundred million, four hundred forty-eight thousand, nine hundred five".