3572232221 has 2 divisors, whose sum is σ = 3572232222. Its totient is φ = 3572232220.

The previous prime is 3572232211. The next prime is 3572232239. The reversal of 3572232221 is 1222322753.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3571855225 + 376996 = 59765^2 + 614^2 .

It is an emirp because it is prime and its reverse (1222322753) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3572232221 - 2²² = 3568037917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3572232211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1786116110 + 1786116111.

It is an arithmetic number, because the mean of its divisors is an integer number (1786116111).

Almost surely, 2^3572232221 is an apocalyptic number.

It is an amenable number.

3572232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3572232221 is an equidigital number, since it uses as much as digits as its factorization.

3572232221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 29.

The square root of 3572232221 is about 59768.1539032284. The cubic root of 3572232221 is about 1528.6681877297.

Adding to 3572232221 its reverse (1222322753), we get a palindrome (4794554974).

The spelling of 3572232221 in words is "three billion, five hundred seventy-two million, two hundred thirty-two thousand, two hundred twenty-one".