63561231 has 12 divisors (see below), whose sum is σ = 93367560. Its totient is φ = 41655600.

The previous prime is 63561221. The next prime is 63561263. The reversal of 63561231 is 13216536.

63561231 is a `hidden beast` number, since 635 + 6 + 1 + 23 + 1 = 666.

It is not a de Polignac number, because 63561231 - 2¹⁰ = 63560207 is a prime.

It is a super-2 number, since 2×63561231² = 8080060172470722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63561195 and 63561204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63561221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59320 + ... + 60381.

It is an arithmetic number, because the mean of its divisors is an integer number (7780630).

Almost surely, 2^63561231 is an apocalyptic number.

63561231 is a deficient number, since it is larger than the sum of its proper divisors (29806329).

63561231 is a wasteful number, since it uses less digits than its factorization.

63561231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119766 (or 119763 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 63561231 is about 7972.5297741683. The cubic root of 63561231 is about 399.0838009672.

Adding to 63561231 its reverse (13216536), we get a palindrome (76777767).

The spelling of 63561231 in words is "sixty-three million, five hundred sixty-one thousand, two hundred thirty-one".