223777145 has 4 divisors (see below), whose sum is σ = 268532580. Its totient is φ = 179021712.

The previous prime is 223777133. The next prime is 223777181. The reversal of 223777145 is 541777322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51222649 + 172554496 = 7157^2 + 13136^2 .

It is a cyclic number.

It is not a de Polignac number, because 223777145 - 2¹⁸ = 223515001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223777099 and 223777108.

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, 22377710 + ... + 22377719.

It is an arithmetic number, because the mean of its divisors is an integer number (67133145).

Almost surely, 2^223777145 is an apocalyptic number.

It is an amenable number.

223777145 is a deficient number, since it is larger than the sum of its proper divisors (44755435).

223777145 is an equidigital number, since it uses as much as digits as its factorization.

223777145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44755434.

The product of its digits is 82320, while the sum is 38.

The square root of 223777145 is about 14959.1826314141. The cubic root of 223777145 is about 607.1163230717.

The spelling of 223777145 in words is "two hundred twenty-three million, seven hundred seventy-seven thousand, one hundred forty-five".