165420326 has 4 divisors (see below), whose sum is σ = 248130492. Its totient is φ = 82710162.

The previous prime is 165420293. The next prime is 165420331. The reversal of 165420326 is 623024561.

165420326 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: 623024561 = 41 ⋅15195721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41355080 + ... + 41355083.

It is an arithmetic number, because the mean of its divisors is an integer number (62032623).

Almost surely, 2^165420326 is an apocalyptic number.

165420326 is a deficient number, since it is larger than the sum of its proper divisors (82710166).

165420326 is an equidigital number, since it uses as much as digits as its factorization.

165420326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82710165.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 165420326 is about 12861.5833395426. The cubic root of 165420326 is about 548.9459990703.

Adding to 165420326 its reverse (623024561), we get a palindrome (788444887).

The spelling of 165420326 in words is "one hundred sixty-five million, four hundred twenty thousand, three hundred twenty-six".