226218281 has 4 divisors (see below), whose sum is σ = 226292112. Its totient is φ = 226144452.

The previous prime is 226218263. The next prime is 226218287. The reversal of 226218281 is 182812622.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226218281 is a prime.

It is a super-2 number, since 2×226218281² = 102349421317189922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226218287) 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, 32111 + ... + 38516.

It is an arithmetic number, because the mean of its divisors is an integer number (56573028).

Almost surely, 2^226218281 is an apocalyptic number.

It is an amenable number.

226218281 is a deficient number, since it is larger than the sum of its proper divisors (73831).

226218281 is an equidigital number, since it uses as much as digits as its factorization.

226218281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73830.

The product of its digits is 6144, while the sum is 32.

The square root of 226218281 is about 15040.5545442979. The cubic root of 226218281 is about 609.3159769649.

The spelling of 226218281 in words is "two hundred twenty-six million, two hundred eighteen thousand, two hundred eighty-one".