1555212052133 has 2 divisors, whose sum is σ = 1555212052134. Its totient is φ = 1555212052132.

The previous prime is 1555212052117. The next prime is 1555212052139. The reversal of 1555212052133 is 3312502125551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1046647671364 + 508564380769 = 1023058^2 + 713137^2 .

It is an emirp because it is prime and its reverse (3312502125551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1555212052133 - 2⁴ = 1555212052117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1555212052093 and 1555212052102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555212052139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777606026066 + 777606026067.

It is an arithmetic number, because the mean of its divisors is an integer number (777606026067).

Almost surely, 2^{1555212052133} is an apocalyptic number.

It is an amenable number.

1555212052133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555212052133 is an equidigital number, since it uses as much as digits as its factorization.

1555212052133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 35.

Adding to 1555212052133 its reverse (3312502125551), we get a palindrome (4867714177684).

The spelling of 1555212052133 in words is "one trillion, five hundred fifty-five billion, two hundred twelve million, fifty-two thousand, one hundred thirty-three".