165431603 has 8 divisors (see below), whose sum is σ = 168766416. Its totient is φ = 162104800.

The previous prime is 165431579. The next prime is 165431627. The reversal of 165431603 is 306134561.

It is a happy number.

165431603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165431579) and next prime (165431627).

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

It is a cyclic number.

It is not a de Polignac number, because 165431603 - 2¹⁰ = 165430579 is a prime.

It is a super-2 number, since 2×165431603² = 54735230542299218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165431653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56393 + ... + 59253.

It is an arithmetic number, because the mean of its divisors is an integer number (21095802).

Almost surely, 2^165431603 is an apocalyptic number.

165431603 is a deficient number, since it is larger than the sum of its proper divisors (3334813).

165431603 is a wasteful number, since it uses less digits than its factorization.

165431603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 165431603 is about 12862.0217306612. The cubic root of 165431603 is about 548.9584729976.

The spelling of 165431603 in words is "one hundred sixty-five million, four hundred thirty-one thousand, six hundred three".