3730434221 has 4 divisors (see below), whose sum is σ = 3731082432. Its totient is φ = 3729786012.

The previous prime is 3730434209. The next prime is 3730434347. The reversal of 3730434221 is 1224340373.

3730434221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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: 1224340373 = 19 ⋅64438967.

It is a cyclic number.

It is not a de Polignac number, because 3730434221 - 2⁶ = 3730434157 is a prime.

It is a super-2 number, since 2×3730434221² = 27832278954415753682, 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 (3730434821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315395 + ... + 327008.

It is an arithmetic number, because the mean of its divisors is an integer number (932770608).

Almost surely, 2^3730434221 is an apocalyptic number.

It is an amenable number.

3730434221 is a deficient number, since it is larger than the sum of its proper divisors (648211).

3730434221 is an equidigital number, since it uses as much as digits as its factorization.

3730434221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648210.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 3730434221 is about 61077.2807269610. The cubic root of 3730434221 is about 1550.9095211424.

Adding to 3730434221 its reverse (1224340373), we get a palindrome (4954774594).

The spelling of 3730434221 in words is "three billion, seven hundred thirty million, four hundred thirty-four thousand, two hundred twenty-one".