215481400814972 has 48 divisors (see below), whose sum is σ = 382424918037792. Its totient is φ = 106218436423680.

The previous prime is 215481400814971. The next prime is 215481400814989. The reversal of 215481400814972 is 279418004184512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215481400814971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11459938523 + ... + 11459957325.

It is an arithmetic number, because the mean of its divisors is an integer number (7967185792454).

Almost surely, 2^{215481400814972} is an apocalyptic number.

It is an amenable number.

215481400814972 is a deficient number, since it is larger than the sum of its proper divisors (166943517222820).

215481400814972 is a wasteful number, since it uses less digits than its factorization.

215481400814972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33918 (or 33916 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 215481400814972 in words is "two hundred fifteen trillion, four hundred eighty-one billion, four hundred million, eight hundred fourteen thousand, nine hundred seventy-two".