226267821 has 12 divisors (see below), whose sum is σ = 351972348. Its totient is φ = 139241664.

The previous prime is 226267817. The next prime is 226267829. The reversal of 226267821 is 128762622.

226267821 is a `hidden beast` number, since 2 + 2 + 626 + 7 + 8 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 120692196 + 105575625 = 10986^2 + 10275^2 .

It is not a de Polignac number, because 226267821 - 2² = 226267817 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226267829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 966840 + ... + 967073.

It is an arithmetic number, because the mean of its divisors is an integer number (29331029).

Almost surely, 2^226267821 is an apocalyptic number.

It is an amenable number.

226267821 is a deficient number, since it is larger than the sum of its proper divisors (125704527).

226267821 is a wasteful number, since it uses less digits than its factorization.

226267821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933932 (or 1933929 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 226267821 is about 15042.2013349111. The cubic root of 226267821 is about 609.3604521655.

The spelling of 226267821 in words is "two hundred twenty-six million, two hundred sixty-seven thousand, eight hundred twenty-one".