2272821397 has 16 divisors (see below), whose sum is σ = 2837532672. Its totient is φ = 1768601520.

The previous prime is 2272821377. The next prime is 2272821413. The reversal of 2272821397 is 7931282722.

It is not a de Polignac number, because 2272821397 - 2⁷ = 2272821269 is a prime.

It is a super-2 number, since 2×2272821397² = 10331434205322063218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272821377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37348 + ... + 77074.

It is an arithmetic number, because the mean of its divisors is an integer number (177345792).

Almost surely, 2^2272821397 is an apocalyptic number.

It is an amenable number.

2272821397 is a deficient number, since it is larger than the sum of its proper divisors (564711275).

2272821397 is a wasteful number, since it uses less digits than its factorization.

2272821397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40488.

The product of its digits is 169344, while the sum is 43.

The square root of 2272821397 is about 47674.1166357595. The cubic root of 2272821397 is about 1314.7860971454.

The spelling of 2272821397 in words is "two billion, two hundred seventy-two million, eight hundred twenty-one thousand, three hundred ninety-seven".