213387 has 4 divisors (see below), whose sum is σ = 284520. Its totient is φ = 142256.

The previous prime is 213383. The next prime is 213391. The reversal of 213387 is 783312.

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

It is an interprime number because it is at equal distance from previous prime (213383) and next prime (213391).

It is a cyclic number.

It is not a de Polignac number, because 213387 - 2² = 213383 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (213383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35562 + ... + 35567.

It is an arithmetic number, because the mean of its divisors is an integer number (71130).

2²¹³³⁸⁷ is an apocalyptic number.

213387 is a deficient number, since it is larger than the sum of its proper divisors (71133).

213387 is an equidigital number, since it uses as much as digits as its factorization.

213387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71132.

The product of its digits is 1008, while the sum is 24.

The square root of 213387 is about 461.9383075693. The cubic root of 213387 is about 59.7570733268.

Adding to 213387 its reverse (783312), we get a palindrome (996699).

The spelling of 213387 in words is "two hundred thirteen thousand, three hundred eighty-seven".