165212398 has 16 divisors (see below), whose sum is σ = 267111936. Its totient is φ = 76186080.

The previous prime is 165212393. The next prime is 165212417. The reversal of 165212398 is 893212561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165212393) 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, 41328 + ... + 45148.

It is an arithmetic number, because the mean of its divisors is an integer number (16694496).

Almost surely, 2^165212398 is an apocalyptic number.

165212398 is a deficient number, since it is larger than the sum of its proper divisors (101899538).

165212398 is a wasteful number, since it uses less digits than its factorization.

165212398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499.

The product of its digits is 25920, while the sum is 37.

The square root of 165212398 is about 12853.4975006805. The cubic root of 165212398 is about 548.7159001785.

The spelling of 165212398 in words is "one hundred sixty-five million, two hundred twelve thousand, three hundred ninety-eight".