155331313 has 8 divisors (see below), whose sum is σ = 157405248. Its totient is φ = 153268464.

The previous prime is 155331311. The next prime is 155331331. The reversal of 155331313 is 313133551.

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 155331313 - 2¹ = 155331311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155331311) 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, 27606 + ... + 32752.

It is an arithmetic number, because the mean of its divisors is an integer number (19675656).

Almost surely, 2^155331313 is an apocalyptic number.

It is an amenable number.

155331313 is a deficient number, since it is larger than the sum of its proper divisors (2073935).

155331313 is a wasteful number, since it uses less digits than its factorization.

155331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543.

The product of its digits is 2025, while the sum is 25.

The square root of 155331313 is about 12463.1983455291. The cubic root of 155331313 is about 537.5509962792.

Adding to 155331313 its reverse (313133551), we get a palindrome (468464864).

The spelling of 155331313 in words is "one hundred fifty-five million, three hundred thirty-one thousand, three hundred thirteen".