165387475 has 36 divisors (see below), whose sum is σ = 237772728. Its totient is φ = 113152000.

The previous prime is 165387463. The next prime is 165387479. The reversal of 165387475 is 574783561.

It is not a de Polignac number, because 165387475 - 2¹¹ = 165385427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165387479) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 78435 + ... + 80515.

It is an arithmetic number, because the mean of its divisors is an integer number (6604798).

Almost surely, 2^165387475 is an apocalyptic number.

165387475 is a deficient number, since it is larger than the sum of its proper divisors (72385253).

165387475 is a wasteful number, since it uses less digits than its factorization.

165387475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2114 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

The square root of 165387475 is about 12860.3061783147. The cubic root of 165387475 is about 548.9096580729.

It can be divided in two parts, 165 and 387475, that added together give a triangular number (387640 = T₈₈₀).

The spelling of 165387475 in words is "one hundred sixty-five million, three hundred eighty-seven thousand, four hundred seventy-five".