155422123 has 4 divisors (see below), whose sum is σ = 155447208. Its totient is φ = 155397040.

The previous prime is 155422097. The next prime is 155422139. The reversal of 155422123 is 321224551.

155422123 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155422123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155429123) 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, 4215 + ... + 18127.

It is an arithmetic number, because the mean of its divisors is an integer number (38861802).

Almost surely, 2^155422123 is an apocalyptic number.

155422123 is a deficient number, since it is larger than the sum of its proper divisors (25085).

155422123 is a wasteful number, since it uses less digits than its factorization.

155422123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25084.

The product of its digits is 2400, while the sum is 25.

The square root of 155422123 is about 12466.8409390671. The cubic root of 155422123 is about 537.6557304661.

Adding to 155422123 its reverse (321224551), we get a palindrome (476646674).

The spelling of 155422123 in words is "one hundred fifty-five million, four hundred twenty-two thousand, one hundred twenty-three".