155530 has 16 divisors (see below), whose sum is σ = 284544. Its totient is φ = 61200.

The previous prime is 155521. The next prime is 155537. The reversal of 155530 is 35551.

It is a junction number, because it is equal to n+sod(n) for n = 155498 and 155507.

It is a congruent number.

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

155530 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 in 7 ways as a sum of consecutive naturals, for example, 955 + ... + 1105.

It is an arithmetic number, because the mean of its divisors is an integer number (17784).

2¹⁵⁵⁵³⁰ is an apocalyptic number.

155530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155530 is a deficient number, since it is larger than the sum of its proper divisors (129014).

155530 is a wasteful number, since it uses less digits than its factorization.

155530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 155530 is about 394.3729199628. The cubic root of 155530 is about 53.7780095587.

The spelling of 155530 in words is "one hundred fifty-five thousand, five hundred thirty".