7357522421 has 2 divisors, whose sum is σ = 7357522422. Its totient is φ = 7357522420.

The previous prime is 7357522339. The next prime is 7357522433. The reversal of 7357522421 is 1242257537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3792835396 + 3564687025 = 61586^2 + 59705^2 .

It is a cyclic number.

It is not a de Polignac number, because 7357522421 - 2¹⁰ = 7357521397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7357522621) 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 as a sum of consecutive naturals, namely, 3678761210 + 3678761211.

It is an arithmetic number, because the mean of its divisors is an integer number (3678761211).

Almost surely, 2^7357522421 is an apocalyptic number.

It is an amenable number.

7357522421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7357522421 is an equidigital number, since it uses as much as digits as its factorization.

7357522421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 38.

The square root of 7357522421 is about 85776.0014281384. The cubic root of 7357522421 is about 1944.9593611253.

Adding to 7357522421 its reverse (1242257537), we get a palindrome (8599779958).

The spelling of 7357522421 in words is "seven billion, three hundred fifty-seven million, five hundred twenty-two thousand, four hundred twenty-one".