226390287 has 4 divisors (see below), whose sum is σ = 301853720. Its totient is φ = 150926856.

The previous prime is 226390271. The next prime is 226390289. The reversal of 226390287 is 782093622.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 226390287 - 2⁴ = 226390271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226390289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37731712 + ... + 37731717.

It is an arithmetic number, because the mean of its divisors is an integer number (75463430).

Almost surely, 2^226390287 is an apocalyptic number.

226390287 is a deficient number, since it is larger than the sum of its proper divisors (75463433).

226390287 is an equidigital number, since it uses as much as digits as its factorization.

226390287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75463432.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 226390287 is about 15046.2715315124. The cubic root of 226390287 is about 609.4703698098.

The spelling of 226390287 in words is "two hundred twenty-six million, three hundred ninety thousand, two hundred eighty-seven".