1555550225233 has 2 divisors, whose sum is σ = 1555550225234. Its totient is φ = 1555550225232.

The previous prime is 1555550225221. The next prime is 1555550225249. The reversal of 1555550225233 is 3325220555551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118162434624 + 437387790609 = 1057432^2 + 661353^2 .

It is an emirp because it is prime and its reverse (3325220555551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1555550225233 - 2²⁵ = 1555516670801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1555550225233.

It is not a weakly prime, because it can be changed into another prime (1555550225263) 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, 777775112616 + 777775112617.

It is an arithmetic number, because the mean of its divisors is an integer number (777775112617).

Almost surely, 2^{1555550225233} is an apocalyptic number.

It is an amenable number.

1555550225233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555550225233 is an equidigital number, since it uses as much as digits as its factorization.

1555550225233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125000, while the sum is 43.

The spelling of 1555550225233 in words is "one trillion, five hundred fifty-five billion, five hundred fifty million, two hundred twenty-five thousand, two hundred thirty-three".