155323013 has 4 divisors (see below), whose sum is σ = 155348940. Its totient is φ = 155297088.

The previous prime is 155323001. The next prime is 155323037. The reversal of 155323013 is 310323551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59243809 + 96079204 = 7697^2 + 9802^2 .

It is a cyclic number.

It is not a de Polignac number, because 155323013 - 2⁶ = 155322949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155323013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155323513) 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, 1133 + ... + 17661.

It is an arithmetic number, because the mean of its divisors is an integer number (38837235).

Almost surely, 2^155323013 is an apocalyptic number.

It is an amenable number.

155323013 is a deficient number, since it is larger than the sum of its proper divisors (25927).

155323013 is an equidigital number, since it uses as much as digits as its factorization.

155323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25926.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 155323013 is about 12462.8653607427. The cubic root of 155323013 is about 537.5414215780.

Adding to 155323013 its reverse (310323551), we get a palindrome (465646564).

The spelling of 155323013 in words is "one hundred fifty-five million, three hundred twenty-three thousand, thirteen".