4213433621 has 2 divisors, whose sum is σ = 4213433622. Its totient is φ = 4213433620.

The previous prime is 4213433617. The next prime is 4213433633. The reversal of 4213433621 is 1263343124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4197744100 + 15689521 = 64790^2 + 3961^2 .

It is a cyclic number.

It is not a de Polignac number, because 4213433621 - 2² = 4213433617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4213432621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106716810 + 2106716811.

It is an arithmetic number, because the mean of its divisors is an integer number (2106716811).

Almost surely, 2^4213433621 is an apocalyptic number.

It is an amenable number.

4213433621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4213433621 is an equidigital number, since it uses as much as digits as its factorization.

4213433621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 4213433621 is about 64910.9668777164. The cubic root of 4213433621 is about 1615.1469890209.

Adding to 4213433621 its reverse (1263343124), we get a palindrome (5476776745).

The spelling of 4213433621 in words is "four billion, two hundred thirteen million, four hundred thirty-three thousand, six hundred twenty-one".