213402 has 16 divisors (see below), whose sum is σ = 487872. Its totient is φ = 60960.

The previous prime is 213397. The next prime is 213407. The reversal of 213402 is 204312.

It is an interprime number because it is at equal distance from previous prime (213397) and next prime (213407).

It is not an unprimeable number, because it can be changed into a prime (213407) by changing a digit.

213402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2499 + ... + 2582.

It is an arithmetic number, because the mean of its divisors is an integer number (30492).

2²¹³⁴⁰² is an apocalyptic number.

213402 is an abundant number, since it is smaller than the sum of its proper divisors (274470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213402 is a wasteful number, since it uses less digits than its factorization.

213402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 213402 is about 461.9545432183. The cubic root of 213402 is about 59.7584734982.

Adding to 213402 its reverse (204312), we get a palindrome (417714).

The spelling of 213402 in words is "two hundred thirteen thousand, four hundred two".