63506261 has 16 divisors (see below), whose sum is σ = 78376704. Its totient is φ = 50108544.

The previous prime is 63506257. The next prime is 63506279. The reversal of 63506261 is 16260536.

63506261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63506261 - 2² = 63506257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63506251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43601 + ... + 45033.

It is an arithmetic number, because the mean of its divisors is an integer number (4898544).

Almost surely, 2^63506261 is an apocalyptic number.

It is an amenable number.

63506261 is a deficient number, since it is larger than the sum of its proper divisors (14870443).

63506261 is a wasteful number, since it uses less digits than its factorization.

63506261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 63506261 is about 7969.0815656511. The cubic root of 63506261 is about 398.9687205250.

Adding to 63506261 its reverse (16260536), we get a palindrome (79766797).

The spelling of 63506261 in words is "sixty-three million, five hundred six thousand, two hundred sixty-one".