3216355307497 has 2 divisors, whose sum is σ = 3216355307498. Its totient is φ = 3216355307496.

The previous prime is 3216355307489. The next prime is 3216355307537. The reversal of 3216355307497 is 7947035536123.

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., 2589061211136 + 627294096361 = 1609056^2 + 792019^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216355307497 - 2³ = 3216355307489 is a prime.

It is not a weakly prime, because it can be changed into another prime (3216355302497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608177653748 + 1608177653749.

It is an arithmetic number, because the mean of its divisors is an integer number (1608177653749).

Almost surely, 2^{3216355307497} is an apocalyptic number.

It is an amenable number.

3216355307497 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216355307497 is an equidigital number, since it uses as much as digits as its factorization.

3216355307497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 55.

The spelling of 3216355307497 in words is "three trillion, two hundred sixteen billion, three hundred fifty-five million, three hundred seven thousand, four hundred ninety-seven".