213470 has 8 divisors (see below), whose sum is σ = 384264. Its totient is φ = 85384.

The previous prime is 213467. The next prime is 213481. The reversal of 213470 is 74312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10664 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (48033).

2²¹³⁴⁷⁰ is an apocalyptic number.

213470 is a deficient number, since it is larger than the sum of its proper divisors (170794).

213470 is a wasteful number, since it uses less digits than its factorization.

213470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21354.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 213470 is about 462.0281376713. The cubic root of 213470 is about 59.7648201189.

Adding to 213470 its reverse (74312), we get a palindrome (287782).

The spelling of 213470 in words is "two hundred thirteen thousand, four hundred seventy".