7216512397 has 2 divisors, whose sum is σ = 7216512398. Its totient is φ = 7216512396.

The previous prime is 7216512389. The next prime is 7216512419. The reversal of 7216512397 is 7932156127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3629580516 + 3586931881 = 60246^2 + 59891^2 .

It is a cyclic number.

It is not a de Polignac number, because 7216512397 - 2³ = 7216512389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7216510397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608256198 + 3608256199.

It is an arithmetic number, because the mean of its divisors is an integer number (3608256199).

Almost surely, 2^7216512397 is an apocalyptic number.

It is an amenable number.

7216512397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216512397 is an equidigital number, since it uses as much as digits as its factorization.

7216512397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 7216512397 is about 84950.0582518929. The cubic root of 7216512397 is about 1932.4538036594.

The spelling of 7216512397 in words is "seven billion, two hundred sixteen million, five hundred twelve thousand, three hundred ninety-seven".