215331728004 has 36 divisors (see below), whose sum is σ = 551200773760. Its totient is φ = 70868669040.

The previous prime is 215331727997. The next prime is 215331728011. The reversal of 215331728004 is 400827133512.

It is an interprime number because it is at equal distance from previous prime (215331727997) and next prime (215331728011).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 215331728004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37854352 + ... + 37860039.

Almost surely, 2^215331728004 is an apocalyptic number.

It is an amenable number.

215331728004 is an abundant number, since it is smaller than the sum of its proper divisors (335869045756).

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

215331728004 is a wasteful number, since it uses less digits than its factorization.

215331728004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75714480 (or 75714475 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 215331728004 in words is "two hundred fifteen billion, three hundred thirty-one million, seven hundred twenty-eight thousand, four".