1550521101253 has 2 divisors, whose sum is σ = 1550521101254. Its totient is φ = 1550521101252.

The previous prime is 1550521101169. The next prime is 1550521101287. The reversal of 1550521101253 is 3521011250551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1204062900804 + 346458200449 = 1097298^2 + 588607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550521101253 - 2²⁹ = 1549984230341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550521101293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775260550626 + 775260550627.

It is an arithmetic number, because the mean of its divisors is an integer number (775260550627).

Almost surely, 2^{1550521101253} is an apocalyptic number.

It is an amenable number.

1550521101253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550521101253 is an equidigital number, since it uses as much as digits as its factorization.

1550521101253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 1550521101253 in words is "one trillion, five hundred fifty billion, five hundred twenty-one million, one hundred one thousand, two hundred fifty-three".