47663281 has 4 divisors (see below), whose sum is σ = 47722864. Its totient is φ = 47603700.

The previous prime is 47663263. The next prime is 47663299. The reversal of 47663281 is 18236674.

47663281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (47663263) and next prime (47663299).

It is a cyclic number.

It is not a de Polignac number, because 47663281 - 2²³ = 39274673 is a prime.

It is a super-2 number, since 2×47663281² = 4543576711369922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47663281.

It is not an unprimeable number, because it can be changed into a prime (47661281) 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 3 ways as a sum of consecutive naturals, for example, 28575 + ... + 30196.

It is an arithmetic number, because the mean of its divisors is an integer number (11930716).

Almost surely, 2^47663281 is an apocalyptic number.

47663281 is the 3088-th centered decagonal number.

It is an amenable number.

47663281 is a deficient number, since it is larger than the sum of its proper divisors (59583).

47663281 is an equidigital number, since it uses as much as digits as its factorization.

47663281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59582.

The product of its digits is 48384, while the sum is 37.

The square root of 47663281 is about 6903.8598624248. The cubic root of 47663281 is about 362.5723194594.

The spelling of 47663281 in words is "forty-seven million, six hundred sixty-three thousand, two hundred eighty-one".