155532223 has 24 divisors (see below), whose sum is σ = 199396944. Its totient is φ = 119952000.

The previous prime is 155532211. The next prime is 155532227. The reversal of 155532223 is 322235551.

It is not a de Polignac number, because 155532223 - 2⁹ = 155531711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155532191 and 155532200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155532227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53011 + ... + 55867.

It is an arithmetic number, because the mean of its divisors is an integer number (8308206).

Almost surely, 2^155532223 is an apocalyptic number.

155532223 is a deficient number, since it is larger than the sum of its proper divisors (43864721).

155532223 is a wasteful number, since it uses less digits than its factorization.

155532223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983 (or 2976 counting only the distinct ones).

The product of its digits is 9000, while the sum is 28.

The square root of 155532223 is about 12471.2558710019. The cubic root of 155532223 is about 537.7826577492.

Adding to 155532223 its reverse (322235551), we get a palindrome (477767774).

The spelling of 155532223 in words is "one hundred fifty-five million, five hundred thirty-two thousand, two hundred twenty-three".