155043313 has 4 divisors (see below), whose sum is σ = 157167268. Its totient is φ = 152919360.

The previous prime is 155043277. The next prime is 155043323. The reversal of 155043313 is 313340551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313340551 = 8117 ⋅38603.

It can be written as a sum of positive squares in 2 ways, for example, as 31899904 + 123143409 = 5648^2 + 11097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155043313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155043323) 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, 1061868 + ... + 1062013.

It is an arithmetic number, because the mean of its divisors is an integer number (39291817).

Almost surely, 2^155043313 is an apocalyptic number.

It is an amenable number.

155043313 is a deficient number, since it is larger than the sum of its proper divisors (2123955).

155043313 is an equidigital number, since it uses as much as digits as its factorization.

155043313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123954.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 155043313 is about 12451.6389684250. The cubic root of 155043313 is about 537.2185660621.

Adding to 155043313 its reverse (313340551), we get a palindrome (468383864).

The spelling of 155043313 in words is "one hundred fifty-five million, forty-three thousand, three hundred thirteen".