226664181 has 6 divisors (see below), whose sum is σ = 327403830. Its totient is φ = 151109448.

The previous prime is 226664173. The next prime is 226664189. The reversal of 226664181 is 181466622.

It is an interprime number because it is at equal distance from previous prime (226664173) and next prime (226664189).

It can be written as a sum of positive squares in only one way, i.e., 192265956 + 34398225 = 13866^2 + 5865^2 .

It is not a de Polignac number, because 226664181 - 2³ = 226664173 is a prime.

It is a super-2 number, since 2×226664181² = 102753301896801522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226664189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12592446 + ... + 12592463.

It is an arithmetic number, because the mean of its divisors is an integer number (54567305).

Almost surely, 2^226664181 is an apocalyptic number.

It is an amenable number.

226664181 is a deficient number, since it is larger than the sum of its proper divisors (100739649).

226664181 is a wasteful number, since it uses less digits than its factorization.

226664181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25184915 (or 25184912 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 226664181 is about 15055.3705035778. The cubic root of 226664181 is about 609.7160561505.

The spelling of 226664181 in words is "two hundred twenty-six million, six hundred sixty-four thousand, one hundred eighty-one".