155422243 has 4 divisors (see below), whose sum is σ = 155776720. Its totient is φ = 155067768.

The previous prime is 155422139. The next prime is 155422249. The reversal of 155422243 is 342224551.

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 155422243 - 2⁹ = 155421731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155422249) 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, 176580 + ... + 177457.

It is an arithmetic number, because the mean of its divisors is an integer number (38944180).

Almost surely, 2^155422243 is an apocalyptic number.

155422243 is a deficient number, since it is larger than the sum of its proper divisors (354477).

155422243 is an equidigital number, since it uses as much as digits as its factorization.

155422243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354476.

The product of its digits is 9600, while the sum is 28.

The square root of 155422243 is about 12466.8457518331. The cubic root of 155422243 is about 537.6558688391.

Adding to 155422243 its reverse (342224551), we get a palindrome (497646794).

The spelling of 155422243 in words is "one hundred fifty-five million, four hundred twenty-two thousand, two hundred forty-three".