223249121 has 4 divisors (see below), whose sum is σ = 224727744. Its totient is φ = 221770500.

The previous prime is 223249099. The next prime is 223249129. The reversal of 223249121 is 121942322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121942322 = 2 ⋅60971161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223249121 is a prime.

It is a super-3 number, since 3×223249121³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223249129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739085 + ... + 739386.

It is an arithmetic number, because the mean of its divisors is an integer number (56181936).

Almost surely, 2^223249121 is an apocalyptic number.

It is an amenable number.

223249121 is a deficient number, since it is larger than the sum of its proper divisors (1478623).

223249121 is a wasteful number, since it uses less digits than its factorization.

223249121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478622.

The product of its digits is 1728, while the sum is 26.

The square root of 223249121 is about 14941.5233828415. The cubic root of 223249121 is about 606.6384302695.

The spelling of 223249121 in words is "two hundred twenty-three million, two hundred forty-nine thousand, one hundred twenty-one".