155115505 has 16 divisors (see below), whose sum is σ = 191979648. Its totient is φ = 120240000.

The previous prime is 155115481. The next prime is 155115511. The reversal of 155115505 is 505511551.

It is not a de Polignac number, because 155115505 - 2⁷ = 155115377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28450 + ... + 33460.

It is an arithmetic number, because the mean of its divisors is an integer number (11998728).

Almost surely, 2^155115505 is an apocalyptic number.

It is an amenable number.

155115505 is a deficient number, since it is larger than the sum of its proper divisors (36864143).

155115505 is a wasteful number, since it uses less digits than its factorization.

155115505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 155115505 is about 12454.5375265403. The cubic root of 155115505 is about 537.3019338731.

The spelling of 155115505 in words is "one hundred fifty-five million, one hundred fifteen thousand, five hundred five".