155445313 has 4 divisors (see below), whose sum is σ = 157047940. Its totient is φ = 153842688.

The previous prime is 155445299. The next prime is 155445317. The reversal of 155445313 is 313544551.

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 125283249 + 30162064 = 11193^2 + 5492^2 .

It is a cyclic number.

It is not a de Polignac number, because 155445313 - 2⁵ = 155445281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155445317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801168 + ... + 801361.

It is an arithmetic number, because the mean of its divisors is an integer number (39261985).

Almost surely, 2^155445313 is an apocalyptic number.

It is an amenable number.

155445313 is a deficient number, since it is larger than the sum of its proper divisors (1602627).

155445313 is an equidigital number, since it uses as much as digits as its factorization.

155445313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602626.

The product of its digits is 18000, while the sum is 31.

The square root of 155445313 is about 12467.7709715891. The cubic root of 155445313 is about 537.6824697232.

Adding to 155445313 its reverse (313544551), we get a palindrome (468989864).

The spelling of 155445313 in words is "one hundred fifty-five million, four hundred forty-five thousand, three hundred thirteen".