2164321625 has 8 divisors (see below), whose sum is σ = 2701073544. Its totient is φ = 1731457200.

The previous prime is 2164321589. The next prime is 2164321639. The reversal of 2164321625 is 5261234612.

It can be written as a sum of positive squares in 4 ways, for example, as 20539024 + 2143782601 = 4532^2 + 46301^2 .

It is not a de Polignac number, because 2164321625 - 2²⁴ = 2147544409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2164321591 and 2164321600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8657162 + ... + 8657411.

It is an arithmetic number, because the mean of its divisors is an integer number (337634193).

Almost surely, 2^2164321625 is an apocalyptic number.

2164321625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2164321625 is a deficient number, since it is larger than the sum of its proper divisors (536751919).

2164321625 is an equidigital number, since it uses as much as digits as its factorization.

2164321625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17314588 (or 17314578 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 2164321625 is about 46522.2702047095. The cubic root of 2164321625 is about 1293.5223377478.

The spelling of 2164321625 in words is "two billion, one hundred sixty-four million, three hundred twenty-one thousand, six hundred twenty-five".