155218369223 has 4 divisors (see below), whose sum is σ = 155564067600. Its totient is φ = 154872670848.

The previous prime is 155218369199. The next prime is 155218369247. The reversal of 155218369223 is 322963812551.

It is a happy number.

155218369223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (155218369199) and next prime (155218369247).

It is a cyclic number.

It is not a de Polignac number, because 155218369223 - 2²⁰ = 155217320647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155218360223) 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, 172848515 + ... + 172849412.

It is an arithmetic number, because the mean of its divisors is an integer number (38891016900).

Almost surely, 2^155218369223 is an apocalyptic number.

155218369223 is a deficient number, since it is larger than the sum of its proper divisors (345698377).

155218369223 is an equidigital number, since it uses as much as digits as its factorization.

155218369223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345698376.

The product of its digits is 777600, while the sum is 47.

The spelling of 155218369223 in words is "one hundred fifty-five billion, two hundred eighteen million, three hundred sixty-nine thousand, two hundred twenty-three".