155988285 has 32 divisors (see below), whose sum is σ = 255578880. Its totient is φ = 81216000.

The previous prime is 155988281. The next prime is 155988289. The reversal of 155988285 is 582889551.

It is an interprime number because it is at equal distance from previous prime (155988281) and next prime (155988289).

It is not a de Polignac number, because 155988285 - 2² = 155988281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155988281) 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 31 ways as a sum of consecutive naturals, for example, 137601 + ... + 138729.

It is an arithmetic number, because the mean of its divisors is an integer number (7986840).

Almost surely, 2^155988285 is an apocalyptic number.

155988285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155988285 is a deficient number, since it is larger than the sum of its proper divisors (99590595).

155988285 is a wasteful number, since it uses less digits than its factorization.

155988285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349.

The product of its digits is 1152000, while the sum is 51.

The square root of 155988285 is about 12489.5270126614. The cubic root of 155988285 is about 538.3077855860.

The spelling of 155988285 in words is "one hundred fifty-five million, nine hundred eighty-eight thousand, two hundred eighty-five".