155244005 has 12 divisors (see below), whose sum is σ = 216708300. Its totient is φ = 106452864.

The previous prime is 155243993. The next prime is 155244007. The reversal of 155244005 is 500442551.

It can be written as a sum of positive squares in 2 ways, for example, as 101324356 + 53919649 = 10066^2 + 7343^2 .

It is not a de Polignac number, because 155244005 - 2¹⁶ = 155178469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155244007) 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 11 ways as a sum of consecutive naturals, for example, 316580 + ... + 317069.

It is an arithmetic number, because the mean of its divisors is an integer number (18059025).

Almost surely, 2^155244005 is an apocalyptic number.

It is an amenable number.

155244005 is a deficient number, since it is larger than the sum of its proper divisors (61464295).

155244005 is an equidigital number, since it uses as much as digits as its factorization.

155244005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633668 (or 633661 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 155244005 is about 12459.6952209916. The cubic root of 155244005 is about 537.4502625691.

Adding to 155244005 its reverse (500442551), we get a palindrome (655686556).

The spelling of 155244005 in words is "one hundred fifty-five million, two hundred forty-four thousand, five".