7384481521 has 2 divisors, whose sum is σ = 7384481522. Its totient is φ = 7384481520.

The previous prime is 7384481459. The next prime is 7384481543. The reversal of 7384481521 is 1251844837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5294163121 + 2090318400 = 72761^2 + 45720^2 .

It is an emirp because it is prime and its reverse (1251844837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7384481521 - 2⁹ = 7384481009 is a prime.

It is not a weakly prime, because it can be changed into another prime (7384481021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3692240760 + 3692240761.

It is an arithmetic number, because the mean of its divisors is an integer number (3692240761).

Almost surely, 2^7384481521 is an apocalyptic number.

It is an amenable number.

7384481521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7384481521 is an equidigital number, since it uses as much as digits as its factorization.

7384481521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 43.

The square root of 7384481521 is about 85933.0060046779. The cubic root of 7384481521 is about 1947.3320095269.

The spelling of 7384481521 in words is "seven billion, three hundred eighty-four million, four hundred eighty-one thousand, five hundred twenty-one".