213146 has 8 divisors (see below), whose sum is σ = 338580. Its totient is φ = 100288.

The previous prime is 213139. The next prime is 213149. The reversal of 213146 is 641312.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 625 = 461^2 + 25^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213149) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3101 + ... + 3168.

2²¹³¹⁴⁶ is an apocalyptic number.

213146 is a deficient number, since it is larger than the sum of its proper divisors (125434).

213146 is a wasteful number, since it uses less digits than its factorization.

213146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6288.

The product of its digits is 144, while the sum is 17.

The square root of 213146 is about 461.6773765304. The cubic root of 213146 is about 59.7345682386.

Adding to 213146 its reverse (641312), we get a palindrome (854458).

It can be divided in two parts, 21 and 3146, that multiplied together give a palindrome (66066).

The spelling of 213146 in words is "two hundred thirteen thousand, one hundred forty-six".