2165674431 has 8 divisors (see below), whose sum is σ = 2889951280. Its totient is φ = 1442590272.

The previous prime is 2165674391. The next prime is 2165674451. The reversal of 2165674431 is 1344765612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2165674431 - 2²² = 2161480127 is a prime.

It is a super-2 number, since 2×2165674431² = 9380291482174347522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2165674431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165674451) 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, 293926 + ... + 301203.

It is an arithmetic number, because the mean of its divisors is an integer number (361243910).

Almost surely, 2^2165674431 is an apocalyptic number.

2165674431 is a deficient number, since it is larger than the sum of its proper divisors (724276849).

2165674431 is a wasteful number, since it uses less digits than its factorization.

2165674431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596345.

The product of its digits is 120960, while the sum is 39.

The square root of 2165674431 is about 46536.8072712342. The cubic root of 2165674431 is about 1293.7917863513.

The spelling of 2165674431 in words is "two billion, one hundred sixty-five million, six hundred seventy-four thousand, four hundred thirty-one".