6550513 has 2 divisors, whose sum is σ = 6550514. Its totient is φ = 6550512.

The previous prime is 6550501. The next prime is 6550519. The reversal of 6550513 is 3150556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3968064 + 2582449 = 1992^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550513 - 2⁹ = 6550001 is a prime.

6550513 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6550519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275256 + 3275257.

It is an arithmetic number, because the mean of its divisors is an integer number (3275257).

Almost surely, 2^6550513 is an apocalyptic number.

It is an amenable number.

6550513 is a deficient number, since it is larger than the sum of its proper divisors (1).

6550513 is an equidigital number, since it uses as much as digits as its factorization.

6550513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 6550513 is about 2559.3969992950. The cubic root of 6550513 is about 187.1077476792.

It can be divided in two parts, 655051 and 3, that multiplied together give a triangular number (1965153 = T₁₉₈₂).

The spelling of 6550513 in words is "six million, five hundred fifty thousand, five hundred thirteen".