6550252321 has 2 divisors, whose sum is σ = 6550252322. Its totient is φ = 6550252320.

The previous prime is 6550252237. The next prime is 6550252369. The reversal of 6550252321 is 1232520556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5705536225 + 844716096 = 75535^2 + 29064^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550252321 - 2¹⁵ = 6550219553 is a prime.

It is not a weakly prime, because it can be changed into another prime (6550252381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275126160 + 3275126161.

It is an arithmetic number, because the mean of its divisors is an integer number (3275126161).

Almost surely, 2^6550252321 is an apocalyptic number.

It is an amenable number.

6550252321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6550252321 is an equidigital number, since it uses as much as digits as its factorization.

6550252321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 6550252321 is about 80933.6291105249. The cubic root of 6550252321 is about 1871.0526564932.

Adding to 6550252321 its reverse (1232520556), we get a palindrome (7782772877).

The spelling of 6550252321 in words is "six billion, five hundred fifty million, two hundred fifty-two thousand, three hundred twenty-one".