7431838221 has 16 divisors (see below), whose sum is σ = 10148998464. Its totient is φ = 4834833024.

The previous prime is 7431838187. The next prime is 7431838229. The reversal of 7431838221 is 1228381347.

It is not a de Polignac number, because 7431838221 - 2¹¹ = 7431836173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7431838221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7431838229) 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 15 ways as a sum of consecutive naturals, for example, 115255 + ... + 167771.

It is an arithmetic number, because the mean of its divisors is an integer number (634312404).

Almost surely, 2^7431838221 is an apocalyptic number.

It is an amenable number.

7431838221 is a deficient number, since it is larger than the sum of its proper divisors (2717160243).

7431838221 is a wasteful number, since it uses less digits than its factorization.

7431838221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53660.

The product of its digits is 64512, while the sum is 39.

The square root of 7431838221 is about 86208.1099491225. The cubic root of 7431838221 is about 1951.4858910075.

The spelling of 7431838221 in words is "seven billion, four hundred thirty-one million, eight hundred thirty-eight thousand, two hundred twenty-one".