226228691 has 4 divisors (see below), whose sum is σ = 243630912. Its totient is φ = 208826472.

The previous prime is 226228663. The next prime is 226228699. The reversal of 226228691 is 196822622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196822622 = 2 ⋅98411311.

It is a cyclic number.

It is not a de Polignac number, because 226228691 - 2⁶ = 226228627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226228699) 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, 8701091 + ... + 8701116.

It is an arithmetic number, because the mean of its divisors is an integer number (60907728).

Almost surely, 2^226228691 is an apocalyptic number.

226228691 is a deficient number, since it is larger than the sum of its proper divisors (17402221).

226228691 is a wasteful number, since it uses less digits than its factorization.

226228691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17402220.

The product of its digits is 41472, while the sum is 38.

The square root of 226228691 is about 15040.9006046845. The cubic root of 226228691 is about 609.3253232211.

It can be divided in two parts, 22622 and 8691, that added together give a palindrome (31313).

The spelling of 226228691 in words is "two hundred twenty-six million, two hundred twenty-eight thousand, six hundred ninety-one".