226828621 has 4 divisors (see below), whose sum is σ = 228096000. Its totient is φ = 225561244.

The previous prime is 226828619. The next prime is 226828639. The reversal of 226828621 is 126828622.

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 226828621 - 2¹ = 226828619 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 (226828661) 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, 633421 + ... + 633778.

It is an arithmetic number, because the mean of its divisors is an integer number (57024000).

Almost surely, 2^226828621 is an apocalyptic number.

It is an amenable number.

226828621 is a deficient number, since it is larger than the sum of its proper divisors (1267379).

226828621 is a wasteful number, since it uses less digits than its factorization.

226828621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267378.

The product of its digits is 36864, while the sum is 37.

The square root of 226828621 is about 15060.8306875816. The cubic root of 226828621 is about 609.8634658142.

Subtracting from 226828621 its reverse (126828622), we obtain a palindrome (99999999).

The spelling of 226828621 in words is "two hundred twenty-six million, eight hundred twenty-eight thousand, six hundred twenty-one".