178242113 has 4 divisors (see below), whose sum is σ = 203705280. Its totient is φ = 152778948.

The previous prime is 178242109. The next prime is 178242131. The reversal of 178242113 is 311242871.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 311242871 = 53 ⋅5872507.

It is not a de Polignac number, because 178242113 - 2² = 178242109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (178242193) by changing a digit.

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, 12731573 + ... + 12731586.

It is an arithmetic number, because the mean of its divisors is an integer number (50926320).

Almost surely, 2^178242113 is an apocalyptic number.

It is an amenable number.

178242113 is a deficient number, since it is larger than the sum of its proper divisors (25463167).

178242113 is an equidigital number, since it uses as much as digits as its factorization.

178242113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25463166.

The product of its digits is 2688, while the sum is 29.

The square root of 178242113 is about 13350.7345490801. The cubic root of 178242113 is about 562.7775623082. Note that the first 3 decimals are identical.

Adding to 178242113 its reverse (311242871), we get a palindrome (489484984).

The spelling of 178242113 in words is "one hundred seventy-eight million, two hundred forty-two thousand, one hundred thirteen".