165253474 has 8 divisors (see below), whose sum is σ = 247935708. Its totient is φ = 82608240.

The previous prime is 165253471. The next prime is 165253489. The reversal of 165253474 is 474352561.

It can be written as a sum of positive squares in 2 ways, for example, as 161112249 + 4141225 = 12693^2 + 2035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (165253471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9604 + ... + 20560.

Almost surely, 2^165253474 is an apocalyptic number.

165253474 is a deficient number, since it is larger than the sum of its proper divisors (82682234).

165253474 is a wasteful number, since it uses less digits than its factorization.

165253474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18500.

The product of its digits is 100800, while the sum is 37.

The square root of 165253474 is about 12855.0952544118. The cubic root of 165253474 is about 548.7613713153.

The spelling of 165253474 in words is "one hundred sixty-five million, two hundred fifty-three thousand, four hundred seventy-four".