63503261 has 2 divisors, whose sum is σ = 63503262. Its totient is φ = 63503260.

The previous prime is 63503249. The next prime is 63503267. The reversal of 63503261 is 16230536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59197636 + 4305625 = 7694^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 63503261 - 2²² = 59308957 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 63503261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63503267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31751630 + 31751631.

It is an arithmetic number, because the mean of its divisors is an integer number (31751631).

Almost surely, 2^63503261 is an apocalyptic number.

It is an amenable number.

63503261 is a deficient number, since it is larger than the sum of its proper divisors (1).

63503261 is an equidigital number, since it uses as much as digits as its factorization.

63503261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 63503261 is about 7968.8933359658. The cubic root of 63503261 is about 398.9624380735.

Adding to 63503261 its reverse (16230536), we get a palindrome (79733797).

The spelling of 63503261 in words is "sixty-three million, five hundred three thousand, two hundred sixty-one".