155161505 has 16 divisors (see below), whose sum is σ = 196420800. Its totient is φ = 117339840.

The previous prime is 155161459. The next prime is 155161549. The reversal of 155161505 is 505161551.

It is a happy number.

It is not a de Polignac number, because 155161505 - 2⁸ = 155161249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49886 + ... + 52904.

It is an arithmetic number, because the mean of its divisors is an integer number (12276300).

Almost surely, 2^155161505 is an apocalyptic number.

It is an amenable number.

155161505 is a deficient number, since it is larger than the sum of its proper divisors (41259295).

155161505 is a wasteful number, since it uses less digits than its factorization.

155161505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 155161505 is about 12456.3841061522. The cubic root of 155161505 is about 537.3550414937.

The spelling of 155161505 in words is "one hundred fifty-five million, one hundred sixty-one thousand, five hundred five".