155311323 has 4 divisors (see below), whose sum is σ = 207081768. Its totient is φ = 103540880.

The previous prime is 155311309. The next prime is 155311349. The reversal of 155311323 is 323113551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323113551 = 3 ⋅107704517.

It is a cyclic number.

It is not a de Polignac number, because 155311323 - 2¹² = 155307227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155311293 and 155311302.

It is not an unprimeable number, because it can be changed into a prime (155311523) 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, 25885218 + ... + 25885223.

It is an arithmetic number, because the mean of its divisors is an integer number (51770442).

Almost surely, 2^155311323 is an apocalyptic number.

155311323 is a deficient number, since it is larger than the sum of its proper divisors (51770445).

155311323 is an equidigital number, since it uses as much as digits as its factorization.

155311323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51770444.

The product of its digits is 1350, while the sum is 24.

The square root of 155311323 is about 12462.3963586463. The cubic root of 155311323 is about 537.5279356672.

Adding to 155311323 its reverse (323113551), we get a palindrome (478424874).

The spelling of 155311323 in words is "one hundred fifty-five million, three hundred eleven thousand, three hundred twenty-three".