7212343561 has 2 divisors, whose sum is σ = 7212343562. Its totient is φ = 7212343560.

The previous prime is 7212343547. The next prime is 7212343577. The reversal of 7212343561 is 1653432127.

7212343561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3645865161 + 3566478400 = 60381^2 + 59720^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212343561 - 2⁷ = 7212343433 is a prime.

It is not a weakly prime, because it can be changed into another prime (7212343261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606171780 + 3606171781.

It is an arithmetic number, because the mean of its divisors is an integer number (3606171781).

Almost surely, 2^7212343561 is an apocalyptic number.

It is an amenable number.

7212343561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212343561 is an equidigital number, since it uses as much as digits as its factorization.

7212343561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 7212343561 is about 84925.5177258284. The cubic root of 7212343561 is about 1932.0816185780.

Adding to 7212343561 its reverse (1653432127), we get a palindrome (8865775688).

The spelling of 7212343561 in words is "seven billion, two hundred twelve million, three hundred forty-three thousand, five hundred sixty-one".