165310420 has 24 divisors (see below), whose sum is σ = 378711648. Its totient is φ = 60112800.

The previous prime is 165310417. The next prime is 165310429. The reversal of 165310420 is 24013561.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 165310391 and 165310400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165310429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375486 + ... + 375925.

It is an arithmetic number, because the mean of its divisors is an integer number (15779652).

Almost surely, 2^165310420 is an apocalyptic number.

165310420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165310420 is an abundant number, since it is smaller than the sum of its proper divisors (213401228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165310420 is a wasteful number, since it uses less digits than its factorization.

165310420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751431 (or 751429 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 165310420 is about 12857.3099830408. The cubic root of 165310420 is about 548.8243980815.

Adding to 165310420 its reverse (24013561), we get a palindrome (189323981).

The spelling of 165310420 in words is "one hundred sixty-five million, three hundred ten thousand, four hundred twenty".