180242155 has 4 divisors (see below), whose sum is σ = 216290592. Its totient is φ = 144193720.

The previous prime is 180242137. The next prime is 180242201. The reversal of 180242155 is 551242081.

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

It is a de Polignac number, because none of the positive numbers 2^k-180242155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18024211 + ... + 18024220.

It is an arithmetic number, because the mean of its divisors is an integer number (54072648).

Almost surely, 2^180242155 is an apocalyptic number.

180242155 is a deficient number, since it is larger than the sum of its proper divisors (36048437).

180242155 is an equidigital number, since it uses as much as digits as its factorization.

180242155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36048436.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 180242155 is about 13425.4294158511. The cubic root of 180242155 is about 564.8747000708.

The spelling of 180242155 in words is "one hundred eighty million, two hundred forty-two thousand, one hundred fifty-five".