2234240821 has 2 divisors, whose sum is σ = 2234240822. Its totient is φ = 2234240820.

The previous prime is 2234240807. The next prime is 2234240849. The reversal of 2234240821 is 1280424322.

It is an a-pointer prime, because the next prime (2234240849) can be obtained adding 2234240821 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1270138321 + 964102500 = 35639^2 + 31050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2234240821 - 2¹⁷ = 2234109749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2234240821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2234244821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1117120410 + 1117120411.

It is an arithmetic number, because the mean of its divisors is an integer number (1117120411).

Almost surely, 2^2234240821 is an apocalyptic number.

It is an amenable number.

2234240821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2234240821 is an equidigital number, since it uses as much as digits as its factorization.

2234240821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 2234240821 is about 47267.7566740796. The cubic root of 2234240821 is about 1307.3042130861.

The spelling of 2234240821 in words is "two billion, two hundred thirty-four million, two hundred forty thousand, eight hundred twenty-one".