155700 has 54 divisors (see below), whose sum is σ = 490854. Its totient is φ = 41280.

The previous prime is 155699. The next prime is 155707. The reversal of 155700 is 7551.

It is a happy number.

155700 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 3 ways, for example, as 34596 + 121104 = 186^2 + 348^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155707) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 814 + ... + 986.

2¹⁵⁵⁷⁰⁰ is an apocalyptic number.

155700 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 155700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245427).

155700 is an abundant number, since it is smaller than the sum of its proper divisors (335154).

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

155700 is a wasteful number, since it uses less digits than its factorization.

155700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 175, while the sum is 18.

The square root of 155700 is about 394.5883931390. The cubic root of 155700 is about 53.7975962037.

The spelling of 155700 in words is "one hundred fifty-five thousand, seven hundred".