4221433261 has 2 divisors, whose sum is σ = 4221433262. Its totient is φ = 4221433260.

The previous prime is 4221433259. The next prime is 4221433309. The reversal of 4221433261 is 1623341224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3321793225 + 899640036 = 57635^2 + 29994^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221433261 - 2¹ = 4221433259 is a prime.

Together with 4221433259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221431261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110716630 + 2110716631.

It is an arithmetic number, because the mean of its divisors is an integer number (2110716631).

Almost surely, 2^4221433261 is an apocalyptic number.

It is an amenable number.

4221433261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221433261 is an equidigital number, since it uses as much as digits as its factorization.

4221433261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

The square root of 4221433261 is about 64972.5577532546. The cubic root of 4221433261 is about 1616.1685173994.

Adding to 4221433261 its reverse (1623341224), we get a palindrome (5844774485).

The spelling of 4221433261 in words is "four billion, two hundred twenty-one million, four hundred thirty-three thousand, two hundred sixty-one".