155211 has 16 divisors (see below), whose sum is σ = 249600. Its totient is φ = 83808.

The previous prime is 155209. The next prime is 155219. The reversal of 155211 is 112551.

It is not a de Polignac number, because 155211 - 2¹ = 155209 is a prime.

It is an Ulam number.

155211 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (155219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205 + ... + 593.

It is an arithmetic number, because the mean of its divisors is an integer number (15600).

2¹⁵⁵²¹¹ is an apocalyptic number.

155211 is a deficient number, since it is larger than the sum of its proper divisors (94389).

155211 is a wasteful number, since it uses less digits than its factorization.

155211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418.

The product of its digits is 50, while the sum is 15.

The square root of 155211 is about 393.9682728342. The cubic root of 155211 is about 53.7412172417.

Adding to 155211 its reverse (112551), we get a palindrome (267762).

The spelling of 155211 in words is "one hundred fifty-five thousand, two hundred eleven".