165153403 has 4 divisors (see below), whose sum is σ = 166414248. Its totient is φ = 163892560.

The previous prime is 165153397. The next prime is 165153407. The reversal of 165153403 is 304351561.

165153403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304351561 = 17 ⋅17903033.

It is a cyclic number.

It is not a de Polignac number, because 165153403 - 2²¹ = 163056251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165153407) 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, 630226 + ... + 630487.

It is an arithmetic number, because the mean of its divisors is an integer number (41603562).

Almost surely, 2^165153403 is an apocalyptic number.

165153403 is a deficient number, since it is larger than the sum of its proper divisors (1260845).

165153403 is a wasteful number, since it uses less digits than its factorization.

165153403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260844.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 165153403 is about 12851.2023951068. The cubic root of 165153403 is about 548.6505795189.

The spelling of 165153403 in words is "one hundred sixty-five million, one hundred fifty-three thousand, four hundred three".