215156 has 18 divisors (see below), whose sum is σ = 400050. Its totient is φ = 101232.

The previous prime is 215153. The next prime is 215161. The reversal of 215156 is 651512.

215156 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 144400 + 70756 = 380^2 + 266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1370 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (22225).

2²¹⁵¹⁵⁶ is an apocalyptic number.

It is an amenable number.

215156 is a deficient number, since it is larger than the sum of its proper divisors (184894).

215156 is a wasteful number, since it uses less digits than its factorization.

215156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 170 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 215156 is about 463.8491133979. The cubic root of 215156 is about 59.9217498448.

Adding to 215156 its reverse (651512), we get a palindrome (866668).

The spelling of 215156 in words is "two hundred fifteen thousand, one hundred fifty-six".