155172065 has 16 divisors (see below), whose sum is σ = 189941760. Its totient is φ = 121660800.

The previous prime is 155172047. The next prime is 155172071. The reversal of 155172065 is 560271551.

It is not a de Polignac number, because 155172065 - 2⁶ = 155172001 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134240 + ... + 135390.

It is an arithmetic number, because the mean of its divisors is an integer number (11871360).

Almost surely, 2^155172065 is an apocalyptic number.

It is an amenable number.

155172065 is a deficient number, since it is larger than the sum of its proper divisors (34769695).

155172065 is a wasteful number, since it uses less digits than its factorization.

155172065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 155172065 is about 12456.8079779693. The cubic root of 155172065 is about 537.3672316748.

The spelling of 155172065 in words is "one hundred fifty-five million, one hundred seventy-two thousand, sixty-five".