2551133342521 has 2 divisors, whose sum is σ = 2551133342522. Its totient is φ = 2551133342520.

The previous prime is 2551133342507. The next prime is 2551133342539. The reversal of 2551133342521 is 1252433311552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2087045404921 + 464087937600 = 1444661^2 + 681240^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551133342521 - 2¹⁹ = 2551132818233 is a prime.

It is not a weakly prime, because it can be changed into another prime (2551133342501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275566671260 + 1275566671261.

It is an arithmetic number, because the mean of its divisors is an integer number (1275566671261).

Almost surely, 2^{2551133342521} is an apocalyptic number.

It is an amenable number.

2551133342521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551133342521 is an equidigital number, since it uses as much as digits as its factorization.

2551133342521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 37.

The spelling of 2551133342521 in words is "two trillion, five hundred fifty-one billion, one hundred thirty-three million, three hundred forty-two thousand, five hundred twenty-one".