63561233 has 4 divisors (see below), whose sum is σ = 63750180. Its totient is φ = 63372288.

The previous prime is 63561221. The next prime is 63561263. The reversal of 63561233 is 33216536.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30118144 + 33443089 = 5488^2 + 5783^2 .

It is a cyclic number.

It is not a de Polignac number, because 63561233 - 2⁴ = 63561217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63561196 and 63561205.

It is not an unprimeable number, because it can be changed into a prime (63561263) 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, 93968 + ... + 94641.

It is an arithmetic number, because the mean of its divisors is an integer number (15937545).

Almost surely, 2^63561233 is an apocalyptic number.

It is an amenable number.

63561233 is a deficient number, since it is larger than the sum of its proper divisors (188947).

63561233 is a wasteful number, since it uses less digits than its factorization.

63561233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188946.

The product of its digits is 9720, while the sum is 29.

The square root of 63561233 is about 7972.5298995990. The cubic root of 63561233 is about 399.0838051531.

Adding to 63561233 its reverse (33216536), we get a palindrome (96777769).

The spelling of 63561233 in words is "sixty-three million, five hundred sixty-one thousand, two hundred thirty-three".