2553361021 has 2 divisors, whose sum is σ = 2553361022. Its totient is φ = 2553361020.

The previous prime is 2553360989. The next prime is 2553361033. The reversal of 2553361021 is 1201633552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2055624921 + 497736100 = 45339^2 + 22310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2553361021 - 2⁵ = 2553360989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2553361051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276680510 + 1276680511.

It is an arithmetic number, because the mean of its divisors is an integer number (1276680511).

Almost surely, 2^2553361021 is an apocalyptic number.

It is an amenable number.

2553361021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2553361021 is an equidigital number, since it uses as much as digits as its factorization.

2553361021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2553361021 is about 50530.7928000343. The cubic root of 2553361021 is about 1366.7971821088.

Adding to 2553361021 its reverse (1201633552), we get a palindrome (3754994573).

The spelling of 2553361021 in words is "two billion, five hundred fifty-three million, three hundred sixty-one thousand, twenty-one".