155538233 has 2 divisors, whose sum is σ = 155538234. Its totient is φ = 155538232.

The previous prime is 155538217. The next prime is 155538301. The reversal of 155538233 is 332835551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133934329 + 21603904 = 11573^2 + 4648^2 .

It is an emirp because it is prime and its reverse (332835551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155538233 - 2⁴ = 155538217 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155538193 and 155538202.

It is not a weakly prime, because it can be changed into another prime (155538833) 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 as a sum of consecutive naturals, namely, 77769116 + 77769117.

It is an arithmetic number, because the mean of its divisors is an integer number (77769117).

Almost surely, 2^155538233 is an apocalyptic number.

It is an amenable number.

155538233 is a deficient number, since it is larger than the sum of its proper divisors (1).

155538233 is an equidigital number, since it uses as much as digits as its factorization.

155538233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 35.

The square root of 155538233 is about 12471.4968227555. The cubic root of 155538233 is about 537.7895845714.

The spelling of 155538233 in words is "one hundred fifty-five million, five hundred thirty-eight thousand, two hundred thirty-three".