2242236421 has 2 divisors, whose sum is σ = 2242236422. Its totient is φ = 2242236420.

The previous prime is 2242236407. The next prime is 2242236449. The reversal of 2242236421 is 1246322422.

It is an a-pointer prime, because the next prime (2242236449) can be obtained adding 2242236421 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., 1422044100 + 820192321 = 37710^2 + 28639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2242236421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2242236421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2242231421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121118210 + 1121118211.

It is an arithmetic number, because the mean of its divisors is an integer number (1121118211).

Almost surely, 2^2242236421 is an apocalyptic number.

It is an amenable number.

2242236421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2242236421 is an equidigital number, since it uses as much as digits as its factorization.

2242236421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

The square root of 2242236421 is about 47352.2588795931. The cubic root of 2242236421 is about 1308.8618245600.

Adding to 2242236421 its reverse (1246322422), we get a palindrome (3488558843).

The spelling of 2242236421 in words is "two billion, two hundred forty-two million, two hundred thirty-six thousand, four hundred twenty-one".