155323505 has 16 divisors (see below), whose sum is σ = 190076544. Its totient is φ = 121820160.

The previous prime is 155323489. The next prime is 155323513. The reversal of 155323505 is 505323551.

It is not a de Polignac number, because 155323505 - 2⁴ = 155323489 is a prime.

It is a Duffinian number.

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, 67382 + ... + 69648.

It is an arithmetic number, because the mean of its divisors is an integer number (11879784).

Almost surely, 2^155323505 is an apocalyptic number.

It is an amenable number.

155323505 is a deficient number, since it is larger than the sum of its proper divisors (34753039).

155323505 is a wasteful number, since it uses less digits than its factorization.

155323505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 11250, while the sum is 29.

The square root of 155323505 is about 12462.8850993660. The cubic root of 155323505 is about 537.5419891481.

The spelling of 155323505 in words is "one hundred fifty-five million, three hundred twenty-three thousand, five hundred five".