63516291 has 4 divisors (see below), whose sum is σ = 84688392. Its totient is φ = 42344192.

The previous prime is 63516287. The next prime is 63516307. The reversal of 63516291 is 19261536.

It is a happy number.

63516291 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 63516291 - 2² = 63516287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63516091) 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, 10586046 + ... + 10586051.

It is an arithmetic number, because the mean of its divisors is an integer number (21172098).

Almost surely, 2^63516291 is an apocalyptic number.

63516291 is a deficient number, since it is larger than the sum of its proper divisors (21172101).

63516291 is a wasteful number, since it uses less digits than its factorization.

63516291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21172100.

The product of its digits is 9720, while the sum is 33.

The square root of 63516291 is about 7969.7108479543. The cubic root of 63516291 is about 398.9897234180.

The spelling of 63516291 in words is "sixty-three million, five hundred sixteen thousand, two hundred ninety-one".