155533 has 8 divisors (see below), whose sum is σ = 188352. Its totient is φ = 125376.

The previous prime is 155521. The next prime is 155537. The reversal of 155533 is 335551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155533 - 2⁵ = 155501 is a prime.

It is a Duffinian number.

155533 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535 + ... + 772.

It is an arithmetic number, because the mean of its divisors is an integer number (23544).

2¹⁵⁵⁵³³ is an apocalyptic number.

It is an amenable number.

155533 is a deficient number, since it is larger than the sum of its proper divisors (32819).

155533 is a wasteful number, since it uses less digits than its factorization.

155533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 1125, while the sum is 22.

The square root of 155533 is about 394.3767234511. The cubic root of 155533 is about 53.7783553290.

It can be divided in two parts, 1555 and 33, that multiplied together give a palindrome (51315).

The spelling of 155533 in words is "one hundred fifty-five thousand, five hundred thirty-three".