165515103 has 16 divisors (see below), whose sum is σ = 264070240. Its totient is φ = 101855232.

The previous prime is 165515101. The next prime is 165515117. The reversal of 165515103 is 301515561.

165515103 is a `hidden beast` number, since 1 + 6 + 551 + 5 + 103 = 666.

It is not a de Polignac number, because 165515103 - 2¹ = 165515101 is a prime.

It is a super-2 number, since 2×165515103² = 54790498642201218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165515101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235426 + ... + 236127.

It is an arithmetic number, because the mean of its divisors is an integer number (16504390).

Almost surely, 2^165515103 is an apocalyptic number.

165515103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165515103 is a deficient number, since it is larger than the sum of its proper divisors (98555137).

165515103 is a wasteful number, since it uses less digits than its factorization.

165515103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471575 (or 471569 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 165515103 is about 12865.2673116418. The cubic root of 165515103 is about 549.0508179541.

The spelling of 165515103 in words is "one hundred sixty-five million, five hundred fifteen thousand, one hundred three".