156213 has 12 divisors (see below), whose sum is σ = 239148. Its totient is φ = 97920.

The previous prime is 156157. The next prime is 156217. The reversal of 156213 is 312651.

It can be written as a sum of positive squares in 2 ways, for example, as 106929 + 49284 = 327^2 + 222^2 .

It is not a de Polignac number, because 156213 - 2¹³ = 148021 is a prime.

It is a Smith number, since the sum of its digits (18) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

156213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (19929).

2¹⁵⁶²¹³ is an apocalyptic number.

It is an amenable number.

156213 is a deficient number, since it is larger than the sum of its proper divisors (82935).

156213 is a wasteful number, since it uses less digits than its factorization.

156213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1041 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 156213 is about 395.2379030407. The cubic root of 156213 is about 53.8566154974.

Adding to 156213 its reverse (312651), we get a palindrome (468864).

The spelling of 156213 in words is "one hundred fifty-six thousand, two hundred thirteen".