3775304221 has 4 divisors (see below), whose sum is σ = 4065712252. Its totient is φ = 3484896192.

The previous prime is 3775304201. The next prime is 3775304251. The reversal of 3775304221 is 1224035773.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224035773 = 9343 ⋅131011.

It can be written as a sum of positive squares in 2 ways, for example, as 176624100 + 3598680121 = 13290^2 + 59989^2 .

It is a cyclic number.

It is not a de Polignac number, because 3775304221 - 2²³ = 3766915613 is a prime.

It is a super-2 number, since 2×3775304221² = 28505843922200833682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3775304201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145203996 + ... + 145204021.

It is an arithmetic number, because the mean of its divisors is an integer number (1016428063).

Almost surely, 2^3775304221 is an apocalyptic number.

It is an amenable number.

3775304221 is a deficient number, since it is larger than the sum of its proper divisors (290408031).

3775304221 is a wasteful number, since it uses less digits than its factorization.

3775304221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290408030.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 3775304221 is about 61443.5043027333. The cubic root of 3775304221 is about 1557.1029155181.

Adding to 3775304221 its reverse (1224035773), we get a palindrome (4999339994).

The spelling of 3775304221 in words is "three billion, seven hundred seventy-five million, three hundred four thousand, two hundred twenty-one".