3506433221 has 2 divisors, whose sum is σ = 3506433222. Its totient is φ = 3506433220.

The previous prime is 3506433197. The next prime is 3506433247. The reversal of 3506433221 is 1223346053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2637952321 + 868480900 = 51361^2 + 29470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3506433221 - 2²² = 3502238917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3506435221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1753216610 + 1753216611.

It is an arithmetic number, because the mean of its divisors is an integer number (1753216611).

Almost surely, 2^3506433221 is an apocalyptic number.

It is an amenable number.

3506433221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3506433221 is an equidigital number, since it uses as much as digits as its factorization.

3506433221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 3506433221 is about 59215.1435107608. The cubic root of 3506433221 is about 1519.2241569505.

Adding to 3506433221 its reverse (1223346053), we get a palindrome (4729779274).

The spelling of 3506433221 in words is "three billion, five hundred six million, four hundred thirty-three thousand, two hundred twenty-one".