223515155 has 4 divisors (see below), whose sum is σ = 268218192. Its totient is φ = 178812120.

The previous prime is 223515143. The next prime is 223515169. The reversal of 223515155 is 551515322.

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

It is not a de Polignac number, because 223515155 - 2⁴ = 223515139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22351511 + ... + 22351520.

It is an arithmetic number, because the mean of its divisors is an integer number (67054548).

Almost surely, 2^223515155 is an apocalyptic number.

223515155 is a deficient number, since it is larger than the sum of its proper divisors (44703037).

223515155 is an equidigital number, since it uses as much as digits as its factorization.

223515155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44703036.

The product of its digits is 7500, while the sum is 29.

The square root of 223515155 is about 14950.4232381562. The cubic root of 223515155 is about 606.8793007742.

The spelling of 223515155 in words is "two hundred twenty-three million, five hundred fifteen thousand, one hundred fifty-five".