155243065 has 8 divisors (see below), whose sum is σ = 197250120. Its totient is φ = 116888832.

The previous prime is 155243063. The next prime is 155243069. The reversal of 155243065 is 560342551.

It can be written as a sum of positive squares in 4 ways, for example, as 3164841 + 152078224 = 1779^2 + 12332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155243065 - 2¹ = 155243063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155243063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913110 + ... + 913279.

It is an arithmetic number, because the mean of its divisors is an integer number (24656265).

Almost surely, 2^155243065 is an apocalyptic number.

It is an amenable number.

155243065 is a deficient number, since it is larger than the sum of its proper divisors (42007055).

155243065 is a wasteful number, since it uses less digits than its factorization.

155243065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826411.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 155243065 is about 12459.6574993055. The cubic root of 155243065 is about 537.4491778160.

The spelling of 155243065 in words is "one hundred fifty-five million, two hundred forty-three thousand, sixty-five".