213544021478832 has 180 divisors, whose sum is σ = 656933800580512. Its totient is φ = 64706529888000.

The previous prime is 213544021478831. The next prime is 213544021478923. The reversal of 213544021478832 is 238874120445312.

213544021478832 is a `hidden beast` number, since 2 + 1 + 3 + 54 + 40 + 2 + 1 + 478 + 83 + 2 = 666.

213544021478832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213544021478831) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 305459478 + ... + 306157770.

Almost surely, 2^{213544021478832} is an apocalyptic number.

213544021478832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213544021478832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328466900290256).

213544021478832 is an abundant number, since it is smaller than the sum of its proper divisors (443389779101680).

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

213544021478832 is a wasteful number, since it uses less digits than its factorization.

213544021478832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715880 (or 715860 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 213544021478832 in words is "two hundred thirteen trillion, five hundred forty-four billion, twenty-one million, four hundred seventy-eight thousand, eight hundred thirty-two".