63506331 has 12 divisors (see below), whose sum is σ = 104835952. Its totient is φ = 36289296.

The previous prime is 63506329. The next prime is 63506357. The reversal of 63506331 is 13360536.

It is not a de Polignac number, because 63506331 - 2¹ = 63506329 is a prime.

It is a super-2 number, since 2×63506331² = 8066108154163122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63506295 and 63506304.

It is not an unprimeable number, because it can be changed into a prime (63507331) 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, 503956 + ... + 504081.

Almost surely, 2^63506331 is an apocalyptic number.

63506331 is a deficient number, since it is larger than the sum of its proper divisors (41329621).

63506331 is a wasteful number, since it uses less digits than its factorization.

63506331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008050 (or 1008047 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 63506331 is about 7969.0859576240. The cubic root of 63506331 is about 398.9688671131.

Adding to 63506331 its reverse (13360536), we get a palindrome (76866867).

The spelling of 63506331 in words is "sixty-three million, five hundred six thousand, three hundred thirty-one".