7425458221 has 2 divisors, whose sum is σ = 7425458222. Its totient is φ = 7425458220.

The previous prime is 7425458219. The next prime is 7425458263. The reversal of 7425458221 is 1228545247.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7393592196 + 31866025 = 85986^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 7425458221 - 2¹ = 7425458219 is a prime.

Together with 7425458219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7425458321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3712729110 + 3712729111.

It is an arithmetic number, because the mean of its divisors is an integer number (3712729111).

Almost surely, 2^7425458221 is an apocalyptic number.

It is an amenable number.

7425458221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7425458221 is an equidigital number, since it uses as much as digits as its factorization.

7425458221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 179200, while the sum is 40.

The square root of 7425458221 is about 86171.0985249695. The cubic root of 7425458221 is about 1950.9273013245.

The spelling of 7425458221 in words is "seven billion, four hundred twenty-five million, four hundred fifty-eight thousand, two hundred twenty-one".