1551052021249 has 2 divisors, whose sum is σ = 1551052021250. Its totient is φ = 1551052021248.

The previous prime is 1551052021219. The next prime is 1551052021283. The reversal of 1551052021249 is 9421202501551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1241760321649 + 309291699600 = 1114343^2 + 556140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551052021249 - 2⁵ = 1551052021217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551052021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775526010624 + 775526010625.

It is an arithmetic number, because the mean of its divisors is an integer number (775526010625).

Almost surely, 2^{1551052021249} is an apocalyptic number.

It is an amenable number.

1551052021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551052021249 is an equidigital number, since it uses as much as digits as its factorization.

1551052021249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 1551052021249 in words is "one trillion, five hundred fifty-one billion, fifty-two million, twenty-one thousand, two hundred forty-nine".