7255533321 has 12 divisors (see below), whose sum is σ = 10490492740. Its totient is φ = 4832278560.

The previous prime is 7255533301. The next prime is 7255533323. The reversal of 7255533321 is 1233355527.

7255533321 is a `hidden beast` number, since 72 + 5 + 553 + 3 + 32 + 1 = 666.

7255533321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4756033296 + 2499500025 = 68964^2 + 49995^2 .

It is not a de Polignac number, because 7255533321 - 2¹⁴ = 7255516937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7255533323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 385606 + ... + 403983.

Almost surely, 2^7255533321 is an apocalyptic number.

It is an amenable number.

7255533321 is a deficient number, since it is larger than the sum of its proper divisors (3234959419).

7255533321 is a wasteful number, since it uses less digits than its factorization.

7255533321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790616 (or 790613 counting only the distinct ones).

The product of its digits is 94500, while the sum is 36.

The square root of 7255533321 is about 85179.4184119615. The cubic root of 7255533321 is about 1935.9305813771.

Adding to 7255533321 its reverse (1233355527), we get a palindrome (8488888848).

The spelling of 7255533321 in words is "seven billion, two hundred fifty-five million, five hundred thirty-three thousand, three hundred twenty-one".