2164857249 has 4 divisors (see below), whose sum is σ = 2886476336. Its totient is φ = 1443238164.

The previous prime is 2164857241. The next prime is 2164857251. The reversal of 2164857249 is 9427584612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2164857249 - 2³ = 2164857241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2164857198 and 2164857207.

It is not an unprimeable number, because it can be changed into a prime (2164857241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360809539 + ... + 360809544.

It is an arithmetic number, because the mean of its divisors is an integer number (721619084).

Almost surely, 2^2164857249 is an apocalyptic number.

It is an amenable number.

2164857249 is a deficient number, since it is larger than the sum of its proper divisors (721619087).

2164857249 is an equidigital number, since it uses as much as digits as its factorization.

2164857249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721619086.

The product of its digits is 967680, while the sum is 48.

The square root of 2164857249 is about 46528.0264894182. The cubic root of 2164857249 is about 1293.6290354545.

The spelling of 2164857249 in words is "two billion, one hundred sixty-four million, eight hundred fifty-seven thousand, two hundred forty-nine".