155113505 has 8 divisors (see below), whose sum is σ = 186210024. Its totient is φ = 124041600.

The previous prime is 155113501. The next prime is 155113507. The reversal of 155113505 is 505311551.

It can be written as a sum of positive squares in 4 ways, for example, as 160801 + 154952704 = 401^2 + 12448^2 .

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

It is not a de Polignac number, because 155113505 - 2² = 155113501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155113501) 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 7 ways as a sum of consecutive naturals, for example, 13325 + ... + 22085.

It is an arithmetic number, because the mean of its divisors is an integer number (23276253).

Almost surely, 2^155113505 is an apocalyptic number.

It is an amenable number.

155113505 is a deficient number, since it is larger than the sum of its proper divisors (31096519).

155113505 is an equidigital number, since it uses as much as digits as its factorization.

155113505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12307.

The product of its (nonzero) digits is 1875, while the sum is 26.

The square root of 155113505 is about 12454.4572342595. The cubic root of 155113505 is about 537.2996246080.

The spelling of 155113505 in words is "one hundred fifty-five million, one hundred thirteen thousand, five hundred five".