63522509 has 2 divisors, whose sum is σ = 63522510. Its totient is φ = 63522508.

The previous prime is 63522497. The next prime is 63522559. The reversal of 63522509 is 90522536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57714409 + 5808100 = 7597^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 63522509 - 2⁸ = 63522253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63522559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31761254 + 31761255.

It is an arithmetic number, because the mean of its divisors is an integer number (31761255).

Almost surely, 2^63522509 is an apocalyptic number.

It is an amenable number.

63522509 is a deficient number, since it is larger than the sum of its proper divisors (1).

63522509 is an equidigital number, since it uses as much as digits as its factorization.

63522509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 63522509 is about 7970.1009403897. The cubic root of 63522509 is about 399.0027428450.

The spelling of 63522509 in words is "sixty-three million, five hundred twenty-two thousand, five hundred nine".