155430 has 48 divisors (see below), whose sum is σ = 443664. Its totient is φ = 37440.

The previous prime is 155423. The next prime is 155443. The reversal of 155430 is 34551.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 912 + ... + 1068.

It is an arithmetic number, because the mean of its divisors is an integer number (9243).

2¹⁵⁵⁴³⁰ is an apocalyptic number.

155430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221832).

155430 is an abundant number, since it is smaller than the sum of its proper divisors (288234).

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

155430 is a wasteful number, since it uses less digits than its factorization.

155430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 155430 is about 394.2461160240. The cubic root of 155430 is about 53.7664813349.

Adding to 155430 its reverse (34551), we get a palindrome (189981).

It can be divided in two parts, 155 and 430, that added together give a palindrome (585).

The spelling of 155430 in words is "one hundred fifty-five thousand, four hundred thirty".