3657882221 has 4 divisors (see below), whose sum is σ = 4180436832. Its totient is φ = 3135327612.

The previous prime is 3657882203. The next prime is 3657882229. The reversal of 3657882221 is 1222887563.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1222887563 = 15073 ⋅81131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3657882221 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 (3657882229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261277295 + ... + 261277308.

It is an arithmetic number, because the mean of its divisors is an integer number (1045109208).

Almost surely, 2^3657882221 is an apocalyptic number.

It is an amenable number.

3657882221 is a deficient number, since it is larger than the sum of its proper divisors (522554611).

3657882221 is an equidigital number, since it uses as much as digits as its factorization.

3657882221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522554610.

The product of its digits is 322560, while the sum is 44.

The square root of 3657882221 is about 60480.4284128345. The cubic root of 3657882221 is about 1540.7892481380.

The spelling of 3657882221 in words is "three billion, six hundred fifty-seven million, eight hundred eighty-two thousand, two hundred twenty-one".