155228 has 12 divisors (see below), whose sum is σ = 274512. Its totient is φ = 76800.

The previous prime is 155219. The next prime is 155231. The reversal of 155228 is 822551.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 732.

It is an arithmetic number, because the mean of its divisors is an integer number (22876).

2¹⁵⁵²²⁸ is an apocalyptic number.

It is an amenable number.

155228 is a deficient number, since it is larger than the sum of its proper divisors (119284).

155228 is a wasteful number, since it uses less digits than its factorization.

155228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 410 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 155228 is about 393.9898475849. The cubic root of 155228 is about 53.7431792318.

Adding to 155228 its reverse (822551), we get a palindrome (977779).

It can be divided in two parts, 155 and 228, that added together give a palindrome (383).

The spelling of 155228 in words is "one hundred fifty-five thousand, two hundred twenty-eight".