226381997 has 4 divisors (see below), whose sum is σ = 230219040. Its totient is φ = 222544956.

The previous prime is 226381993. The next prime is 226382003. The reversal of 226381997 is 799183622.

It is a happy number.

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 226381997 - 2² = 226381993 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 (226381993) 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, 1918433 + ... + 1918550.

It is an arithmetic number, because the mean of its divisors is an integer number (57554760).

Almost surely, 2^226381997 is an apocalyptic number.

It is an amenable number.

226381997 is a deficient number, since it is larger than the sum of its proper divisors (3837043).

226381997 is an equidigital number, since it uses as much as digits as its factorization.

226381997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837042.

The product of its digits is 326592, while the sum is 47.

The square root of 226381997 is about 15045.9960454601. The cubic root of 226381997 is about 609.4629304873.

The spelling of 226381997 in words is "two hundred twenty-six million, three hundred eighty-one thousand, nine hundred ninety-seven".