223212281 has 8 divisors (see below), whose sum is σ = 228528000. Its totient is φ = 217947760.

The previous prime is 223212233. The next prime is 223212289. The reversal of 223212281 is 182212322.

223212281 is nontrivially palindromic in base 9.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223212281 is a prime.

It is a super-3 number, since 3×223212281³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223212289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3905 + ... + 21486.

It is an arithmetic number, because the mean of its divisors is an integer number (28566000).

Almost surely, 2^223212281 is an apocalyptic number.

It is an amenable number.

223212281 is a deficient number, since it is larger than the sum of its proper divisors (5315719).

223212281 is a wasteful number, since it uses less digits than its factorization.

223212281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25599.

The product of its digits is 768, while the sum is 23.

The square root of 223212281 is about 14940.2905259570. The cubic root of 223212281 is about 606.6050597922.

The spelling of 223212281 in words is "two hundred twenty-three million, two hundred twelve thousand, two hundred eighty-one".