63427281 has 4 divisors (see below), whose sum is σ = 84569712. Its totient is φ = 42284852.

The previous prime is 63427277. The next prime is 63427303. The reversal of 63427281 is 18272436.

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 a cyclic number.

It is not a de Polignac number, because 63427281 - 2² = 63427277 is a prime.

It is a super-2 number, since 2×63427281² = 8046039950105922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63427201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10571211 + ... + 10571216.

It is an arithmetic number, because the mean of its divisors is an integer number (21142428).

Almost surely, 2^63427281 is an apocalyptic number.

It is an amenable number.

63427281 is a deficient number, since it is larger than the sum of its proper divisors (21142431).

63427281 is a wasteful number, since it uses less digits than its factorization.

63427281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21142430.

The product of its digits is 16128, while the sum is 33.

The square root of 63427281 is about 7964.1246223298. The cubic root of 63427281 is about 398.8032585119.

The spelling of 63427281 in words is "sixty-three million, four hundred twenty-seven thousand, two hundred eighty-one".