155190 has 32 divisors (see below), whose sum is σ = 426240. Its totient is φ = 35424.

The previous prime is 155171. The next prime is 155191. The reversal of 155190 is 91551.

It is a happy number.

It is a super-2 number, since 2×155190² = 48167872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155191) by changing a digit.

155190 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 15 ways as a sum of consecutive naturals, for example, 160 + ... + 579.

It is an arithmetic number, because the mean of its divisors is an integer number (13320).

2¹⁵⁵¹⁹⁰ is an apocalyptic number.

155190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155190 is an abundant number, since it is smaller than the sum of its proper divisors (271050).

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

155190 is a wasteful number, since it uses less digits than its factorization.

155190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 155190 is about 393.9416200403. The cubic root of 155190 is about 53.7387934091.

The spelling of 155190 in words is "one hundred fifty-five thousand, one hundred ninety".