155131001273 has 2 divisors, whose sum is σ = 155131001274. Its totient is φ = 155131001272.

The previous prime is 155131001189. The next prime is 155131001287. The reversal of 155131001273 is 372100131551.

155131001273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95383998649 + 59747002624 = 308843^2 + 244432^2 .

It is a cyclic number.

It is not a de Polignac number, because 155131001273 - 2¹⁰ = 155131000249 is a prime.

It is not a weakly prime, because it can be changed into another prime (155131001873) 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, 77565500636 + 77565500637.

It is an arithmetic number, because the mean of its divisors is an integer number (77565500637).

Almost surely, 2^155131001273 is an apocalyptic number.

It is an amenable number.

155131001273 is a deficient number, since it is larger than the sum of its proper divisors (1).

155131001273 is an equidigital number, since it uses as much as digits as its factorization.

155131001273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 29.

The spelling of 155131001273 in words is "one hundred fifty-five billion, one hundred thirty-one million, one thousand, two hundred seventy-three".