2165643357 has 8 divisors (see below), whose sum is σ = 2954676384. Its totient is φ = 1410186288.

The previous prime is 2165643343. The next prime is 2165643371. The reversal of 2165643357 is 7533465612.

It is an interprime number because it is at equal distance from previous prime (2165643343) and next prime (2165643371).

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

It is not a de Polignac number, because 2165643357 - 2⁸ = 2165643101 is a prime.

It is a super-2 number, since 2×2165643357² = 9380022299436458898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165643317) 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, 8393838 + ... + 8394095.

It is an arithmetic number, because the mean of its divisors is an integer number (369334548).

Almost surely, 2^2165643357 is an apocalyptic number.

It is an amenable number.

2165643357 is a deficient number, since it is larger than the sum of its proper divisors (789033027).

2165643357 is a wasteful number, since it uses less digits than its factorization.

2165643357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16787979.

The product of its digits is 453600, while the sum is 42.

The square root of 2165643357 is about 46536.4734052764. The cubic root of 2165643357 is about 1293.7855983670.

The spelling of 2165643357 in words is "two billion, one hundred sixty-five million, six hundred forty-three thousand, three hundred fifty-seven".