155260285 has 4 divisors (see below), whose sum is σ = 186312348. Its totient is φ = 124208224.

The previous prime is 155260277. The next prime is 155260289. The reversal of 155260285 is 582062551.

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 27185796 + 128074489 = 5214^2 + 11317^2 .

It is a cyclic number.

It is not a de Polignac number, because 155260285 - 2³ = 155260277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155260285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155260289) 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 3 ways as a sum of consecutive naturals, for example, 15526024 + ... + 15526033.

It is an arithmetic number, because the mean of its divisors is an integer number (46578087).

Almost surely, 2^155260285 is an apocalyptic number.

It is an amenable number.

155260285 is a deficient number, since it is larger than the sum of its proper divisors (31052063).

155260285 is an equidigital number, since it uses as much as digits as its factorization.

155260285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31052062.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 155260285 is about 12460.3485103748. The cubic root of 155260285 is about 537.4690488758.

The spelling of 155260285 in words is "one hundred fifty-five million, two hundred sixty thousand, two hundred eighty-five".