155320 has 32 divisors (see below), whose sum is σ = 382320. Its totient is φ = 56320.

The previous prime is 155317. The next prime is 155327. The reversal of 155320 is 23551.

It is a junction number, because it is equal to n+sod(n) for n = 155294 and 155303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264 + ... + 616.

2¹⁵⁵³²⁰ is an apocalyptic number.

155320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191160).

155320 is an abundant number, since it is smaller than the sum of its proper divisors (227000).

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

155320 is a wasteful number, since it uses less digits than its factorization.

155320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 155320 is about 394.1065845682. The cubic root of 155320 is about 53.7537945762.

Adding to 155320 its reverse (23551), we get a palindrome (178871).

Subtracting from 155320 its reverse (23551), we obtain a square (131769 = 363²).

It can be divided in two parts, 15 and 5320, that multiplied together give a triangular number (79800 = T₃₉₉).

The spelling of 155320 in words is "one hundred fifty-five thousand, three hundred twenty".