2228236021 has 16 divisors (see below), whose sum is σ = 2551201920. Its totient is φ = 1926358720.

The previous prime is 2228236009. The next prime is 2228236027. The reversal of 2228236021 is 1206328222.

It is a happy number.

It is not a de Polignac number, because 2228236021 - 2¹³ = 2228227829 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 (2228236027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18315 + ... + 69223.

It is an arithmetic number, because the mean of its divisors is an integer number (159450120).

Almost surely, 2^2228236021 is an apocalyptic number.

It is an amenable number.

2228236021 is a deficient number, since it is larger than the sum of its proper divisors (322965899).

2228236021 is a wasteful number, since it uses less digits than its factorization.

2228236021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51116.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2228236021 is about 47204.1949512964. The cubic root of 2228236021 is about 1306.1319814133.

The spelling of 2228236021 in words is "two billion, two hundred twenty-eight million, two hundred thirty-six thousand, twenty-one".