213001213987 has 4 divisors (see below), whose sum is σ = 213016630320. Its totient is φ = 212985797656.

The previous prime is 213001213973. The next prime is 213001214033. The reversal of 213001213987 is 789312100312.

213001213987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213001213987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213001223987) 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 3 ways as a sum of consecutive naturals, for example, 7687423 + ... + 7715080.

It is an arithmetic number, because the mean of its divisors is an integer number (53254157580).

Almost surely, 2^213001213987 is an apocalyptic number.

213001213987 is a deficient number, since it is larger than the sum of its proper divisors (15416333).

213001213987 is a wasteful number, since it uses less digits than its factorization.

213001213987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15416332.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 213001213987 in words is "two hundred thirteen billion, one million, two hundred thirteen thousand, nine hundred eighty-seven".