63551313 has 36 divisors (see below), whose sum is σ = 107186560. Its totient is φ = 35538048.

The previous prime is 63551281. The next prime is 63551317. The reversal of 63551313 is 31315536.

63551313 is a `hidden beast` number, since 635 + 5 + 13 + 13 = 666.

It is not a de Polignac number, because 63551313 - 2⁵ = 63551281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63551317) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 562345 + ... + 562457.

Almost surely, 2^63551313 is an apocalyptic number.

63551313 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

63551313 is a deficient number, since it is larger than the sum of its proper divisors (43635247).

63551313 is a wasteful number, since it uses less digits than its factorization.

63551313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 202 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 63551313 is about 7971.9077390547. The cubic root of 63551313 is about 399.0630424065.

Adding to 63551313 its reverse (31315536), we get a palindrome (94866849).

The spelling of 63551313 in words is "sixty-three million, five hundred fifty-one thousand, three hundred thirteen".