223145155 has 4 divisors (see below), whose sum is σ = 267774192. Its totient is φ = 178516120.

The previous prime is 223145107. The next prime is 223145171. The reversal of 223145155 is 551541322.

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

It is not a de Polignac number, because 223145155 - 2¹⁵ = 223112387 is a prime.

It is a super-3 number, since 3×223145155³ (a number of 26 digits) contains 333 as substring.

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, 22314511 + ... + 22314520.

It is an arithmetic number, because the mean of its divisors is an integer number (66943548).

Almost surely, 2^223145155 is an apocalyptic number.

223145155 is a deficient number, since it is larger than the sum of its proper divisors (44629037).

223145155 is an equidigital number, since it uses as much as digits as its factorization.

223145155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44629036.

The product of its digits is 6000, while the sum is 28.

The square root of 223145155 is about 14938.0438813119. The cubic root of 223145155 is about 606.5442461525.

Adding to 223145155 its reverse (551541322), we get a palindrome (774686477).

The spelling of 223145155 in words is "two hundred twenty-three million, one hundred forty-five thousand, one hundred fifty-five".