155255312101 has 4 divisors (see below), whose sum is σ = 156999753900. Its totient is φ = 153510870304.

The previous prime is 155255312077. The next prime is 155255312119. The reversal of 155255312101 is 101213552551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101213552551 = 3469 ⋅29176579.

It can be written as a sum of positive squares in 2 ways, for example, as 66564516001 + 88690796100 = 258001^2 + 297810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155255312101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155255312131) 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 in 3 ways as a sum of consecutive naturals, for example, 872220766 + ... + 872220943.

It is an arithmetic number, because the mean of its divisors is an integer number (39249938475).

Almost surely, 2^155255312101 is an apocalyptic number.

It is an amenable number.

155255312101 is a deficient number, since it is larger than the sum of its proper divisors (1744441799).

155255312101 is an equidigital number, since it uses as much as digits as its factorization.

155255312101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744441798.

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

Adding to 155255312101 its reverse (101213552551), we get a palindrome (256468864652).

The spelling of 155255312101 in words is "one hundred fifty-five billion, two hundred fifty-five million, three hundred twelve thousand, one hundred one".