155382155 has 4 divisors (see below), whose sum is σ = 186458592. Its totient is φ = 124305720.

The previous prime is 155382127. The next prime is 155382173. The reversal of 155382155 is 551283551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155382155 - 2¹⁰ = 155381131 is a prime.

It is a super-2 number, since 2×155382155² = 48287228184888050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15538211 + ... + 15538220.

It is an arithmetic number, because the mean of its divisors is an integer number (46614648).

Almost surely, 2^155382155 is an apocalyptic number.

155382155 is a deficient number, since it is larger than the sum of its proper divisors (31076437).

155382155 is an equidigital number, since it uses as much as digits as its factorization.

155382155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31076436.

The product of its digits is 30000, while the sum is 35.

The square root of 155382155 is about 12465.2378637553. The cubic root of 155382155 is about 537.6096390730.

The spelling of 155382155 in words is "one hundred fifty-five million, three hundred eighty-two thousand, one hundred fifty-five".