63515213 has 16 divisors (see below), whose sum is σ = 71352576. Its totient is φ = 56221440.

The previous prime is 63515209. The next prime is 63515239. The reversal of 63515213 is 31251536.

63515213 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 63515213 - 2² = 63515209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63515293) 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, 22520 + ... + 25182.

It is an arithmetic number, because the mean of its divisors is an integer number (4459536).

Almost surely, 2^63515213 is an apocalyptic number.

It is an amenable number.

63515213 is a deficient number, since it is larger than the sum of its proper divisors (7837363).

63515213 is a wasteful number, since it uses less digits than its factorization.

63515213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764.

The product of its digits is 2700, while the sum is 26.

The square root of 63515213 is about 7969.6432166064. The cubic root of 63515213 is about 398.9874661842.

Adding to 63515213 its reverse (31251536), we get a palindrome (94766749).

The spelling of 63515213 in words is "sixty-three million, five hundred fifteen thousand, two hundred thirteen".