155523313 has 8 divisors (see below), whose sum is σ = 169752096. Its totient is φ = 141309600.

The previous prime is 155523307. The next prime is 155523337. The reversal of 155523313 is 313325551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155523313 - 2²⁵ = 121968881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155523413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38133 + ... + 42013.

It is an arithmetic number, because the mean of its divisors is an integer number (21219012).

Almost surely, 2^155523313 is an apocalyptic number.

It is an amenable number.

155523313 is a deficient number, since it is larger than the sum of its proper divisors (14228783).

155523313 is a wasteful number, since it uses less digits than its factorization.

155523313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535.

The product of its digits is 6750, while the sum is 28.

The square root of 155523313 is about 12470.8986444442. The cubic root of 155523313 is about 537.7723882053.

Adding to 155523313 its reverse (313325551), we get a palindrome (468848864).

The spelling of 155523313 in words is "one hundred fifty-five million, five hundred twenty-three thousand, three hundred thirteen".