63312511 has 4 divisors (see below), whose sum is σ = 63329032. Its totient is φ = 63295992.

The previous prime is 63312463. The next prime is 63312523. The reversal of 63312511 is 11521336.

It is a happy number.

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 63312511 - 2¹⁷ = 63181439 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 (63312551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805 + ... + 11281.

It is an arithmetic number, because the mean of its divisors is an integer number (15832258).

Almost surely, 2^63312511 is an apocalyptic number.

63312511 is a deficient number, since it is larger than the sum of its proper divisors (16521).

63312511 is a wasteful number, since it uses less digits than its factorization.

63312511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520.

The product of its digits is 540, while the sum is 22.

The square root of 63312511 is about 7956.9159226424. The cubic root of 63312511 is about 398.5625719390.

Adding to 63312511 its reverse (11521336), we get a palindrome (74833847).

The spelling of 63312511 in words is "sixty-three million, three hundred twelve thousand, five hundred eleven".