155224 has 8 divisors (see below), whose sum is σ = 291060. Its totient is φ = 77608.

The previous prime is 155219. The next prime is 155231. The reversal of 155224 is 422551.

155224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

155224 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9694 + ... + 9709.

2¹⁵⁵²²⁴ is an apocalyptic number.

It is an amenable number.

155224 is a deficient number, since it is larger than the sum of its proper divisors (135836).

155224 is a wasteful number, since it uses less digits than its factorization.

155224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19409 (or 19405 counting only the distinct ones).

The product of its digits is 400, while the sum is 19.

The square root of 155224 is about 393.9847712793. The cubic root of 155224 is about 53.7427176000.

Adding to 155224 its reverse (422551), we get a palindrome (577775).

It can be divided in two parts, 1 and 55224, that added together give a square (55225 = 235²).

The spelling of 155224 in words is "one hundred fifty-five thousand, two hundred twenty-four".