155165505 has 32 divisors (see below), whose sum is σ = 271531008. Its totient is φ = 75038400.

The previous prime is 155165489. The next prime is 155165519. The reversal of 155165505 is 505561551.

155165505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155165505 - 2⁴ = 155165489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79390 + ... + 81320.

It is an arithmetic number, because the mean of its divisors is an integer number (8485344).

Almost surely, 2^155165505 is an apocalyptic number.

155165505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155165505 is a deficient number, since it is larger than the sum of its proper divisors (116365503).

155165505 is a wasteful number, since it uses less digits than its factorization.

155165505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 155165505 is about 12456.5446653556. The cubic root of 155165505 is about 537.3596590516.

The spelling of 155165505 in words is "one hundred fifty-five million, one hundred sixty-five thousand, five hundred five".