223145554 has 8 divisors (see below), whose sum is σ = 334807308. Its totient is φ = 111543120.

The previous prime is 223145551. The next prime is 223145569. The reversal of 223145554 is 455541322.

It can be written as a sum of positive squares in 2 ways, for example, as 200364025 + 22781529 = 14155^2 + 4773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×223145554³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (223145551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3777 + ... + 21460.

Almost surely, 2^223145554 is an apocalyptic number.

223145554 is a deficient number, since it is larger than the sum of its proper divisors (111661754).

223145554 is a wasteful number, since it uses less digits than its factorization.

223145554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29660.

The product of its digits is 24000, while the sum is 31.

The square root of 223145554 is about 14938.0572364682. The cubic root of 223145554 is about 606.5446076675.

Adding to 223145554 its reverse (455541322), we get a palindrome (678686876).

The spelling of 223145554 in words is "two hundred twenty-three million, one hundred forty-five thousand, five hundred fifty-four".