234720155 has 4 divisors (see below), whose sum is σ = 281664192. Its totient is φ = 187776120.

The previous prime is 234720151. The next prime is 234720179. The reversal of 234720155 is 551027432.

It is a happy number.

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

It is not a de Polignac number, because 234720155 - 2² = 234720151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (234720151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23472011 + ... + 23472020.

It is an arithmetic number, because the mean of its divisors is an integer number (70416048).

Almost surely, 2^234720155 is an apocalyptic number.

234720155 is a deficient number, since it is larger than the sum of its proper divisors (46944037).

234720155 is an equidigital number, since it uses as much as digits as its factorization.

234720155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46944036.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 234720155 is about 15320.5794603207. The cubic root of 234720155 is about 616.8555280633.

Adding to 234720155 its reverse (551027432), we get a palindrome (785747587).

The spelling of 234720155 in words is "two hundred thirty-four million, seven hundred twenty thousand, one hundred fifty-five".