3810222221 has 4 divisors (see below), whose sum is σ = 4103316252. Its totient is φ = 3517128192.

The previous prime is 3810222187. The next prime is 3810222239. The reversal of 3810222221 is 1222220183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2599878121 + 1210344100 = 50989^2 + 34790^2 .

It is a cyclic number.

It is not a de Polignac number, because 3810222221 - 2¹⁰ = 3810221197 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 (3810222271) 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, 146546996 + ... + 146547021.

It is an arithmetic number, because the mean of its divisors is an integer number (1025829063).

Almost surely, 2^3810222221 is an apocalyptic number.

It is an amenable number.

3810222221 is a deficient number, since it is larger than the sum of its proper divisors (293094031).

3810222221 is a wasteful number, since it uses less digits than its factorization.

3810222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293094030.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 3810222221 is about 61726.9975051436. The cubic root of 3810222221 is about 1561.8887681649. Note that the first 3 decimals are identical.

The spelling of 3810222221 in words is "three billion, eight hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".