2231672165 has 4 divisors (see below), whose sum is σ = 2678006604. Its totient is φ = 1785337728.

The previous prime is 2231672117. The next prime is 2231672173. The reversal of 2231672165 is 5612761322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1708086241 + 523585924 = 41329^2 + 22882^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231672165 - 2⁶ = 2231672101 is a prime.

It is a super-3 number, since 3×2231672165³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223167212 + ... + 223167221.

It is an arithmetic number, because the mean of its divisors is an integer number (669501651).

Almost surely, 2^2231672165 is an apocalyptic number.

It is an amenable number.

2231672165 is a deficient number, since it is larger than the sum of its proper divisors (446334439).

2231672165 is an equidigital number, since it uses as much as digits as its factorization.

2231672165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446334438.

The product of its digits is 30240, while the sum is 35.

The square root of 2231672165 is about 47240.5775261057. The cubic root of 2231672165 is about 1306.8030283019.

The spelling of 2231672165 in words is "two billion, two hundred thirty-one million, six hundred seventy-two thousand, one hundred sixty-five".