226321921 has 4 divisors (see below), whose sum is σ = 258653632. Its totient is φ = 193990212.

The previous prime is 226321919. The next prime is 226321961. The reversal of 226321921 is 129123622.

226321921 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, and also an emirpimes, since its reverse is a distinct semiprime: 129123622 = 2 ⋅64561811.

It is a cyclic number.

It is not a de Polignac number, because 226321921 - 2¹ = 226321919 is a prime.

It is a super-2 number, since 2×226321921² = 102443223850260482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 226321921.

It is not an unprimeable number, because it can be changed into a prime (226321961) 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, 16165845 + ... + 16165858.

It is an arithmetic number, because the mean of its divisors is an integer number (64663408).

Almost surely, 2^226321921 is an apocalyptic number.

It is an amenable number.

226321921 is a deficient number, since it is larger than the sum of its proper divisors (32331711).

226321921 is an equidigital number, since it uses as much as digits as its factorization.

226321921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32331710.

The product of its digits is 2592, while the sum is 28.

The square root of 226321921 is about 15043.9995014624. Note that the first 3 decimals coincide. The cubic root of 226321921 is about 609.4090137525.

The spelling of 226321921 in words is "two hundred twenty-six million, three hundred twenty-one thousand, nine hundred twenty-one".