155303243 has 4 divisors (see below), whose sum is σ = 155374488. Its totient is φ = 155232000.

The previous prime is 155303233. The next prime is 155303257. The reversal of 155303243 is 342303551.

155303243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 155303243 - 2⁴ = 155303227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155303233) 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, 32246 + ... + 36747.

It is an arithmetic number, because the mean of its divisors is an integer number (38843622).

Almost surely, 2^155303243 is an apocalyptic number.

155303243 is a deficient number, since it is larger than the sum of its proper divisors (71245).

155303243 is an equidigital number, since it uses as much as digits as its factorization.

155303243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71244.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 155303243 is about 12462.0721792164. The cubic root of 155303243 is about 537.5186139579.

Adding to 155303243 its reverse (342303551), we get a palindrome (497606794).

The spelling of 155303243 in words is "one hundred fifty-five million, three hundred three thousand, two hundred forty-three".