63530251 has 4 divisors (see below), whose sum is σ = 63794104. Its totient is φ = 63266400.

The previous prime is 63530239. The next prime is 63530261. The reversal of 63530251 is 15203536.

It is a happy number.

63530251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63530251 - 2⁷ = 63530123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63530231) 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 3 ways as a sum of consecutive naturals, for example, 131565 + ... + 132046.

It is an arithmetic number, because the mean of its divisors is an integer number (15948526).

Almost surely, 2^63530251 is an apocalyptic number.

63530251 is a deficient number, since it is larger than the sum of its proper divisors (263853).

63530251 is a wasteful number, since it uses less digits than its factorization.

63530251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263852.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 63530251 is about 7970.5866158019. The cubic root of 63530251 is about 399.0189520796.

Adding to 63530251 its reverse (15203536), we get a palindrome (78733787).

The spelling of 63530251 in words is "sixty-three million, five hundred thirty thousand, two hundred fifty-one".