155544 has 16 divisors (see below), whose sum is σ = 388920. Its totient is φ = 51840.

The previous prime is 155539. The next prime is 155557. The reversal of 155544 is 445551.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 6481 = 155544 / (1 + 5 + 5 + 5 + 4 + 4).

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, 3217 + ... + 3264.

2¹⁵⁵⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

155544 is an abundant number, since it is smaller than the sum of its proper divisors (233376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155544 is a wasteful number, since it uses less digits than its factorization.

155544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490 (or 6486 counting only the distinct ones).

The product of its digits is 2000, while the sum is 24.

The square root of 155544 is about 394.3906692608. The cubic root of 155544 is about 53.7796231156.

The spelling of 155544 in words is "one hundred fifty-five thousand, five hundred forty-four".