64277281 has 4 divisors (see below), whose sum is σ = 64516500. Its totient is φ = 64038064.

The previous prime is 64277273. The next prime is 64277293. The reversal of 64277281 is 18277246.

64277281 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.

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 60606225 = 1916^2 + 7785^2 .

It is a cyclic number.

It is not a de Polignac number, because 64277281 - 2³ = 64277273 is a prime.

It is a super-3 number, since 3×64277281³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 64277281.

It is not an unprimeable number, because it can be changed into a prime (64277201) 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, 119206 + ... + 119743.

It is an arithmetic number, because the mean of its divisors is an integer number (16129125).

Almost surely, 2^64277281 is an apocalyptic number.

It is an amenable number.

64277281 is a deficient number, since it is larger than the sum of its proper divisors (239219).

64277281 is a wasteful number, since it uses less digits than its factorization.

64277281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239218.

The product of its digits is 37632, while the sum is 37.

The square root of 64277281 is about 8017.3113323607. The cubic root of 64277281 is about 400.5768364993.

The spelling of 64277281 in words is "sixty-four million, two hundred seventy-seven thousand, two hundred eighty-one".