155481923 has 4 divisors (see below), whose sum is σ = 155512728. Its totient is φ = 155451120.

The previous prime is 155481919. The next prime is 155481961. The reversal of 155481923 is 329184551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329184551 = 241 ⋅1365911.

It is a cyclic number.

It is not a de Polignac number, because 155481923 - 2² = 155481919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155481973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5861 + ... + 18582.

It is an arithmetic number, because the mean of its divisors is an integer number (38878182).

Almost surely, 2^155481923 is an apocalyptic number.

155481923 is a deficient number, since it is larger than the sum of its proper divisors (30805).

155481923 is an equidigital number, since it uses as much as digits as its factorization.

155481923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30804.

The product of its digits is 43200, while the sum is 38.

The square root of 155481923 is about 12469.2390706089. The cubic root of 155481923 is about 537.7246775147.

It can be divided in two parts, 15548 and 1923, that added together give a palindrome (17471).

The spelling of 155481923 in words is "one hundred fifty-five million, four hundred eighty-one thousand, nine hundred twenty-three".