213946 has 8 divisors (see below), whose sum is σ = 334944. Its totient is φ = 102300.

The previous prime is 213943. The next prime is 213947. The reversal of 213946 is 649312.

213946 = 18² + 19² + ... + 86².

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

It is a self number, because there is not a number n which added to its sum of digits gives 213946.

It is not an unprimeable number, because it can be changed into a prime (213943) 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, 2280 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (41868).

2²¹³⁹⁴⁶ is an apocalyptic number.

213946 is a deficient number, since it is larger than the sum of its proper divisors (120998).

213946 is a wasteful number, since it uses less digits than its factorization.

213946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676.

The product of its digits is 1296, while the sum is 25.

The square root of 213946 is about 462.5429709768. The cubic root of 213946 is about 59.8092087696.

The spelling of 213946 in words is "two hundred thirteen thousand, nine hundred forty-six".