7220340421 has 16 divisors (see below), whose sum is σ = 8310145024. Its totient is φ = 6145190064.

The previous prime is 7220340401. The next prime is 7220340427. The reversal of 7220340421 is 1240430227.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220340421 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 (7220340427) 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, 1621420 + ... + 1625866.

It is an arithmetic number, because the mean of its divisors is an integer number (519384064).

Almost surely, 2^7220340421 is an apocalyptic number.

It is an amenable number.

7220340421 is a deficient number, since it is larger than the sum of its proper divisors (1089804603).

7220340421 is a wasteful number, since it uses less digits than its factorization.

7220340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6040.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 7220340421 is about 84972.5862911092. The cubic root of 7220340421 is about 1932.7954355314.

Adding to 7220340421 its reverse (1240430227), we get a palindrome (8460770648).

The spelling of 7220340421 in words is "seven billion, two hundred twenty million, three hundred forty thousand, four hundred twenty-one".