63312261 has 16 divisors (see below), whose sum is σ = 90931200. Its totient is φ = 39069360.

The previous prime is 63312257. The next prime is 63312283. The reversal of 63312261 is 16221336.

It is a happy number.

It is not a de Polignac number, because 63312261 - 2² = 63312257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63312461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12661 + ... + 16938.

It is an arithmetic number, because the mean of its divisors is an integer number (5683200).

Almost surely, 2^63312261 is an apocalyptic number.

It is an amenable number.

63312261 is a deficient number, since it is larger than the sum of its proper divisors (27618939).

63312261 is a wasteful number, since it uses less digits than its factorization.

63312261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29656.

The product of its digits is 1296, while the sum is 24.

The square root of 63312261 is about 7956.9002130227. The cubic root of 63312261 is about 398.5620473413.

Adding to 63312261 its reverse (16221336), we get a palindrome (79533597).

The spelling of 63312261 in words is "sixty-three million, three hundred twelve thousand, two hundred sixty-one".