3730271221 has 4 divisors (see below), whose sum is σ = 3730610700. Its totient is φ = 3729931744.

The previous prime is 3730271219. The next prime is 3730271249. The reversal of 3730271221 is 1221720373.

It is a happy number.

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 2343528100 + 1386743121 = 48410^2 + 37239^2 .

It is a cyclic number.

It is not a de Polignac number, because 3730271221 - 2¹ = 3730271219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3730271221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3730271621) 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, 152686 + ... + 175423.

It is an arithmetic number, because the mean of its divisors is an integer number (932652675).

Almost surely, 2^3730271221 is an apocalyptic number.

It is an amenable number.

3730271221 is a deficient number, since it is larger than the sum of its proper divisors (339479).

3730271221 is a wasteful number, since it uses less digits than its factorization.

3730271221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339478.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 3730271221 is about 61075.9463373266. The cubic root of 3730271221 is about 1550.8869319996.

Adding to 3730271221 its reverse (1221720373), we get a palindrome (4951991594).

The spelling of 3730271221 in words is "three billion, seven hundred thirty million, two hundred seventy-one thousand, two hundred twenty-one".