3625433221 has 2 divisors, whose sum is σ = 3625433222. Its totient is φ = 3625433220.

The previous prime is 3625433183. The next prime is 3625433233. The reversal of 3625433221 is 1223345263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1876102596 + 1749330625 = 43314^2 + 41825^2 .

It is a cyclic number.

It is not a de Polignac number, because 3625433221 - 2⁷ = 3625433093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3625433261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1812716610 + 1812716611.

It is an arithmetic number, because the mean of its divisors is an integer number (1812716611).

Almost surely, 2^3625433221 is an apocalyptic number.

It is an amenable number.

3625433221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3625433221 is an equidigital number, since it uses as much as digits as its factorization.

3625433221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 31.

The square root of 3625433221 is about 60211.5704910609. The cubic root of 3625433221 is about 1536.2196054475.

Adding to 3625433221 its reverse (1223345263), we get a palindrome (4848778484).

The spelling of 3625433221 in words is "three billion, six hundred twenty-five million, four hundred thirty-three thousand, two hundred twenty-one".