165525473 has 4 divisors (see below), whose sum is σ = 174237360. Its totient is φ = 156813588.

The previous prime is 165525467. The next prime is 165525589. The reversal of 165525473 is 374525561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 374525561 = 10079 ⋅37159.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165525473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165525403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4355915 + ... + 4355952.

It is an arithmetic number, because the mean of its divisors is an integer number (43559340).

Almost surely, 2^165525473 is an apocalyptic number.

It is an amenable number.

165525473 is a deficient number, since it is larger than the sum of its proper divisors (8711887).

165525473 is an equidigital number, since it uses as much as digits as its factorization.

165525473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8711886.

The product of its digits is 126000, while the sum is 38.

The square root of 165525473 is about 12865.6703284361. The cubic root of 165525473 is about 549.0622842553.

The spelling of 165525473 in words is "one hundred sixty-five million, five hundred twenty-five thousand, four hundred seventy-three".