155313440331 has 16 divisors (see below), whose sum is σ = 242440493568. Its totient is φ = 86585889600.

The previous prime is 155313440299. The next prime is 155313440351. The reversal of 155313440331 is 133044313551.

It is not a de Polignac number, because 155313440331 - 2⁵ = 155313440299 is a prime.

It is a super-2 number, since 2×155313440331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155313440292 and 155313440301.

It is not an unprimeable number, because it can be changed into a prime (155313440351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90192775 + ... + 90194496.

It is an arithmetic number, because the mean of its divisors is an integer number (15152530848).

Almost surely, 2^155313440331 is an apocalyptic number.

155313440331 is a deficient number, since it is larger than the sum of its proper divisors (87127053237).

155313440331 is a wasteful number, since it uses less digits than its factorization.

155313440331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180387322.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 155313440331 its reverse (133044313551), we get a palindrome (288357753882).

The spelling of 155313440331 in words is "one hundred fifty-five billion, three hundred thirteen million, four hundred forty thousand, three hundred thirty-one".