7051356421 has 2 divisors, whose sum is σ = 7051356422. Its totient is φ = 7051356420.

The previous prime is 7051356349. The next prime is 7051356463. The reversal of 7051356421 is 1246531507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6595064100 + 456292321 = 81210^2 + 21361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7051356421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7051386421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3525678210 + 3525678211.

It is an arithmetic number, because the mean of its divisors is an integer number (3525678211).

Almost surely, 2^7051356421 is an apocalyptic number.

It is an amenable number.

7051356421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7051356421 is an equidigital number, since it uses as much as digits as its factorization.

7051356421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 7051356421 is about 83972.3550997589. The cubic root of 7051356421 is about 1917.5979456413.

Adding to 7051356421 its reverse (1246531507), we get a palindrome (8297887928).

The spelling of 7051356421 in words is "seven billion, fifty-one million, three hundred fifty-six thousand, four hundred twenty-one".