155131240304201 has 4 divisors (see below), whose sum is σ = 177292846061952. Its totient is φ = 132969634546452.

The previous prime is 155131240304179. The next prime is 155131240304213. The reversal of 155131240304201 is 102403042131551.

155131240304201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155131240304201 - 2⁶ = 155131240304137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155131240304101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11080802878865 + ... + 11080802878878.

It is an arithmetic number, because the mean of its divisors is an integer number (44323211515488).

Almost surely, 2^{155131240304201} is an apocalyptic number.

It is an amenable number.

155131240304201 is a deficient number, since it is larger than the sum of its proper divisors (22161605757751).

155131240304201 is an equidigital number, since it uses as much as digits as its factorization.

155131240304201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22161605757750.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 155131240304201 its reverse (102403042131551), we get a palindrome (257534282435752).

The spelling of 155131240304201 in words is "one hundred fifty-five trillion, one hundred thirty-one billion, two hundred forty million, three hundred four thousand, two hundred one".