226833721 has 3 divisors (see below), whose sum is σ = 226848783. Its totient is φ = 226818660.

The previous prime is 226833661. The next prime is 226833743. The reversal of 226833721 is 127338622.

The square root of 226833721 is 15061.

It is a perfect power (a square), and thus also a powerful number.

226833721 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127338622 = 2 ⋅63669311.

It can be written as a sum of positive squares in only one way, i.e., 175854121 + 50979600 = 13261^2 + 7140^2 .

It is not a de Polignac number, because 226833721 - 2⁹ = 226833209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226833781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7531 + ... + 22591.

It is an arithmetic number, because the mean of its divisors is an integer number (75616261).

Almost surely, 2^226833721 is an apocalyptic number.

226833721 is the 15061-st square number.

226833721 is the 7531-st centered octagonal number.

It is an amenable number.

226833721 is a deficient number, since it is larger than the sum of its proper divisors (15062).

226833721 is an frugal number, since it uses more digits than its factorization.

226833721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30122 (or 15061 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The cubic root of 226833721 is about 609.8680364902.

The spelling of 226833721 in words is "two hundred twenty-six million, eight hundred thirty-three thousand, seven hundred twenty-one".