155444 has 6 divisors (see below), whose sum is σ = 272034. Its totient is φ = 77720.

The previous prime is 155443. The next prime is 155453. The reversal of 155444 is 444551.

It can be written as a sum of positive squares in only one way, i.e., 150544 + 4900 = 388^2 + 70^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19427 + ... + 19434.

It is an arithmetic number, because the mean of its divisors is an integer number (45339).

2¹⁵⁵⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

155444 is a deficient number, since it is larger than the sum of its proper divisors (116590).

155444 is a wasteful number, since it uses less digits than its factorization.

155444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38865 (or 38863 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 155444 is about 394.2638710306. The cubic root of 155444 is about 53.7680955838.

Adding to 155444 its reverse (444551), we get a palindrome (599995).

The spelling of 155444 in words is "one hundred fifty-five thousand, four hundred forty-four".