7424735221 has 2 divisors, whose sum is σ = 7424735222. Its totient is φ = 7424735220.

The previous prime is 7424735209. The next prime is 7424735257. The reversal of 7424735221 is 1225374247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6701878225 + 722856996 = 81865^2 + 26886^2 .

It is a cyclic number.

It is not a de Polignac number, because 7424735221 - 2²⁹ = 6887864309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7424735291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3712367610 + 3712367611.

It is an arithmetic number, because the mean of its divisors is an integer number (3712367611).

Almost surely, 2^7424735221 is an apocalyptic number.

It is an amenable number.

7424735221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7424735221 is an equidigital number, since it uses as much as digits as its factorization.

7424735221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 37.

The square root of 7424735221 is about 86166.9032807841. The cubic root of 7424735221 is about 1950.8639801494.

The spelling of 7424735221 in words is "seven billion, four hundred twenty-four million, seven hundred thirty-five thousand, two hundred twenty-one".