6557513 has 2 divisors, whose sum is σ = 6557514. Its totient is φ = 6557512.

The previous prime is 6557479. The next prime is 6557519. The reversal of 6557513 is 3157556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6091024 + 466489 = 2468^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 6557513 - 2¹⁰ = 6556489 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6557513.

It is not a weakly prime, because it can be changed into another prime (6557519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278756 + 3278757.

It is an arithmetic number, because the mean of its divisors is an integer number (3278757).

Almost surely, 2^6557513 is an apocalyptic number.

It is an amenable number.

6557513 is a deficient number, since it is larger than the sum of its proper divisors (1).

6557513 is an equidigital number, since it uses as much as digits as its factorization.

6557513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 32.

The square root of 6557513 is about 2560.7641437665. The cubic root of 6557513 is about 187.1743728920.

The spelling of 6557513 in words is "six million, five hundred fifty-seven thousand, five hundred thirteen".