165224397 has 32 divisors (see below), whose sum is σ = 246718080. Its totient is φ = 97655040.

The previous prime is 165224393. The next prime is 165224401. The reversal of 165224397 is 793422561.

It is an interprime number because it is at equal distance from previous prime (165224393) and next prime (165224401).

It is not a de Polignac number, because 165224397 - 2² = 165224393 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165224393) 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 31 ways as a sum of consecutive naturals, for example, 392247 + ... + 392667.

It is an arithmetic number, because the mean of its divisors is an integer number (7709940).

Almost surely, 2^165224397 is an apocalyptic number.

It is an amenable number.

165224397 is a deficient number, since it is larger than the sum of its proper divisors (81493683).

165224397 is a wasteful number, since it uses less digits than its factorization.

165224397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its digits is 90720, while the sum is 39.

The square root of 165224397 is about 12853.9642523231. The cubic root of 165224397 is about 548.7291838521.

The spelling of 165224397 in words is "one hundred sixty-five million, two hundred twenty-four thousand, three hundred ninety-seven".