213602 has 4 divisors (see below), whose sum is σ = 320406. Its totient is φ = 106800.

The previous prime is 213599. The next prime is 213611. The reversal of 213602 is 206312.

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

It can be written as a sum of positive squares in only one way, i.e., 203401 + 10201 = 451^2 + 101^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53399 + ... + 53402.

2²¹³⁶⁰² is an apocalyptic number.

213602 is a deficient number, since it is larger than the sum of its proper divisors (106804).

213602 is a wasteful number, since it uses less digits than its factorization.

213602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106803.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 213602 is about 462.1709640382. The cubic root of 213602 is about 59.7771361832. Note that the first 3 decimals are identical.

Adding to 213602 its reverse (206312), we get a palindrome (419914).

The spelling of 213602 in words is "two hundred thirteen thousand, six hundred two".