226201661 has 4 divisors (see below), whose sum is σ = 258516192. Its totient is φ = 193887132.

The previous prime is 226201649. The next prime is 226201663. The reversal of 226201661 is 166102622.

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 not a de Polignac number, because 226201661 - 2²⁶ = 159092797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 226201661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226201663) 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, 16157255 + ... + 16157268.

It is an arithmetic number, because the mean of its divisors is an integer number (64629048).

Almost surely, 2^226201661 is an apocalyptic number.

It is an amenable number.

226201661 is a deficient number, since it is larger than the sum of its proper divisors (32314531).

226201661 is an equidigital number, since it uses as much as digits as its factorization.

226201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32314530.

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

The square root of 226201661 is about 15040.0020279254. The cubic root of 226201661 is about 609.3010546820.

The spelling of 226201661 in words is "two hundred twenty-six million, two hundred one thousand, six hundred sixty-one".