63413281 has 8 divisors (see below), whose sum is σ = 68411304. Its totient is φ = 58556160.

The previous prime is 63413267. The next prime is 63413299. The reversal of 63413281 is 18231436.

63413281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17715681 + 45697600 = 4209^2 + 6760^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63413281 - 2⁵ = 63413249 is a prime.

It is a super-2 number, since 2×63413281² = 8042488414369922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63413201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34290 + ... + 36091.

It is an arithmetic number, because the mean of its divisors is an integer number (8551413).

Almost surely, 2^63413281 is an apocalyptic number.

It is an amenable number.

63413281 is a deficient number, since it is larger than the sum of its proper divisors (4998023).

63413281 is a wasteful number, since it uses less digits than its factorization.

63413281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70451.

The product of its digits is 3456, while the sum is 28.

The square root of 63413281 is about 7963.2456322783. The cubic root of 63413281 is about 398.7739143750.

The spelling of 63413281 in words is "sixty-three million, four hundred thirteen thousand, two hundred eighty-one".