213256 has 32 divisors (see below), whose sum is σ = 446400. Its totient is φ = 95040.

The previous prime is 213253. The next prime is 213263. The reversal of 213256 is 652312.

It is a happy number.

213256 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (213253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3466 + ... + 3526.

It is an arithmetic number, because the mean of its divisors is an integer number (13950).

2²¹³²⁵⁶ is an apocalyptic number.

It is an amenable number.

213256 is an abundant number, since it is smaller than the sum of its proper divisors (233144).

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

213256 is a wasteful number, since it uses less digits than its factorization.

213256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 105 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 213256 is about 461.7964919745. The cubic root of 213256 is about 59.7448423739.

Adding to 213256 its reverse (652312), we get a palindrome (865568).

The spelling of 213256 in words is "two hundred thirteen thousand, two hundred fifty-six".