226611997 has 4 divisors (see below), whose sum is σ = 226914496. Its totient is φ = 226309500.

The previous prime is 226611977. The next prime is 226612007. The reversal of 226611997 is 799116622.

It is a happy number.

226611997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-226611997 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 (226611947) 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, 150123 + ... + 151624.

It is an arithmetic number, because the mean of its divisors is an integer number (56728624).

Almost surely, 2^226611997 is an apocalyptic number.

It is an amenable number.

226611997 is a deficient number, since it is larger than the sum of its proper divisors (302499).

226611997 is an equidigital number, since it uses as much as digits as its factorization.

226611997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302498.

The product of its digits is 81648, while the sum is 43.

The square root of 226611997 is about 15053.6373345448. The cubic root of 226611997 is about 609.6692617186.

The spelling of 226611997 in words is "two hundred twenty-six million, six hundred eleven thousand, nine hundred ninety-seven".