213875287 has 4 divisors (see below), whose sum is σ = 214481520. Its totient is φ = 213269056.

The previous prime is 213875273. The next prime is 213875339. The reversal of 213875287 is 782578312.

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

It is a cyclic number.

It is not a de Polignac number, because 213875287 - 2¹¹ = 213873239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213875257) 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, 302587 + ... + 303292.

It is an arithmetic number, because the mean of its divisors is an integer number (53620380).

Almost surely, 2^213875287 is an apocalyptic number.

213875287 is a deficient number, since it is larger than the sum of its proper divisors (606233).

213875287 is an equidigital number, since it uses as much as digits as its factorization.

213875287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606232.

The product of its digits is 188160, while the sum is 43.

The square root of 213875287 is about 14624.4756145306. The cubic root of 213875287 is about 598.0261870390.

The spelling of 213875287 in words is "two hundred thirteen million, eight hundred seventy-five thousand, two hundred eighty-seven".