213720853987 has 8 divisors (see below), whose sum is σ = 214162114256. Its totient is φ = 213279962112.

The previous prime is 213720853937. The next prime is 213720853999. The reversal of 213720853987 is 789358027312.

213720853987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213720853987 - 2¹⁵ = 213720821219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213720853937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1084843 + ... + 1266619.

It is an arithmetic number, because the mean of its divisors is an integer number (26770264282).

Almost surely, 2^213720853987 is an apocalyptic number.

213720853987 is a deficient number, since it is larger than the sum of its proper divisors (441260269).

213720853987 is a wasteful number, since it uses less digits than its factorization.

213720853987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184197.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 213720853987 in words is "two hundred thirteen billion, seven hundred twenty million, eight hundred fifty-three thousand, nine hundred eighty-seven".