3225378821 has 4 divisors (see below), whose sum is σ = 3686147232. Its totient is φ = 2764610412.

The previous prime is 3225378817. The next prime is 3225378847. The reversal of 3225378821 is 1288735223.

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 a cyclic number.

It is not a de Polignac number, because 3225378821 - 2² = 3225378817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3225374821) 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, 230384195 + ... + 230384208.

It is an arithmetic number, because the mean of its divisors is an integer number (921536808).

Almost surely, 2^3225378821 is an apocalyptic number.

It is an amenable number.

3225378821 is a deficient number, since it is larger than the sum of its proper divisors (460768411).

3225378821 is an equidigital number, since it uses as much as digits as its factorization.

3225378821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460768410.

The product of its digits is 161280, while the sum is 41.

The square root of 3225378821 is about 56792.4186929911. The cubic root of 3225378821 is about 1477.4980281943.

The spelling of 3225378821 in words is "three billion, two hundred twenty-five million, three hundred seventy-eight thousand, eight hundred twenty-one".