155243245 has 4 divisors (see below), whose sum is σ = 186291900. Its totient is φ = 124194592.

The previous prime is 155243237. The next prime is 155243267. The reversal of 155243245 is 542342551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39917124 + 115326121 = 6318^2 + 10739^2 .

It is a cyclic number.

It is not a de Polignac number, because 155243245 - 2³ = 155243237 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 15524320 + ... + 15524329.

It is an arithmetic number, because the mean of its divisors is an integer number (46572975).

Almost surely, 2^155243245 is an apocalyptic number.

It is an amenable number.

155243245 is a deficient number, since it is larger than the sum of its proper divisors (31048655).

155243245 is an equidigital number, since it uses as much as digits as its factorization.

155243245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31048654.

The product of its digits is 24000, while the sum is 31.

The square root of 155243245 is about 12459.6647226159. The cubic root of 155243245 is about 537.4493855350.

Adding to 155243245 its reverse (542342551), we get a palindrome (697585796).

It can be divided in two parts, 15524 and 3245, that added together give a square (18769 = 137²).

The spelling of 155243245 in words is "one hundred fifty-five million, two hundred forty-three thousand, two hundred forty-five".