155431135311 has 16 divisors (see below), whose sum is σ = 218210336640. Its totient is φ = 98139414240.

The previous prime is 155431135253. The next prime is 155431135399. The reversal of 155431135311 is 113531134551.

It is not a de Polignac number, because 155431135311 - 2⁶ = 155431135247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155431130311) 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 15 ways as a sum of consecutive naturals, for example, 178260 + ... + 585353.

It is an arithmetic number, because the mean of its divisors is an integer number (13638146040).

Almost surely, 2^155431135311 is an apocalyptic number.

155431135311 is a deficient number, since it is larger than the sum of its proper divisors (62779201329).

155431135311 is a wasteful number, since it uses less digits than its factorization.

155431135311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767206.

The product of its digits is 13500, while the sum is 33.

Adding to 155431135311 its reverse (113531134551), we get a palindrome (268962269862).

The spelling of 155431135311 in words is "one hundred fifty-five billion, four hundred thirty-one million, one hundred thirty-five thousand, three hundred eleven".