3240320557 has 2 divisors, whose sum is σ = 3240320558. Its totient is φ = 3240320556.

The previous prime is 3240320537. The next prime is 3240320563. The reversal of 3240320557 is 7550230423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2565827716 + 674492841 = 50654^2 + 25971^2 .

It is a cyclic number.

It is not a de Polignac number, because 3240320557 - 2¹⁹ = 3239796269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3240320537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1620160278 + 1620160279.

It is an arithmetic number, because the mean of its divisors is an integer number (1620160279).

Almost surely, 2^3240320557 is an apocalyptic number.

It is an amenable number.

3240320557 is a deficient number, since it is larger than the sum of its proper divisors (1).

3240320557 is an equidigital number, since it uses as much as digits as its factorization.

3240320557 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 31.

The square root of 3240320557 is about 56923.8136196091. The cubic root of 3240320557 is about 1479.7760430843.

The spelling of 3240320557 in words is "three billion, two hundred forty million, three hundred twenty thousand, five hundred fifty-seven".