215286256992 has 48 divisors (see below), whose sum is σ = 568919257200. Its totient is φ = 71280456192.

The previous prime is 215286256981. The next prime is 215286257009. The reversal of 215286256992 is 299652682512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7511083 + ... + 7539690.

It is an arithmetic number, because the mean of its divisors is an integer number (11852484525).

Almost surely, 2^215286256992 is an apocalyptic number.

It is an amenable number.

215286256992 is an abundant number, since it is smaller than the sum of its proper divisors (353633000208).

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

215286256992 is a wasteful number, since it uses less digits than its factorization.

215286256992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15050935 (or 15050927 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 57.

The spelling of 215286256992 in words is "two hundred fifteen billion, two hundred eighty-six million, two hundred fifty-six thousand, nine hundred ninety-two".