64500281 has 4 divisors (see below), whose sum is σ = 64733412. Its totient is φ = 64267152.

The previous prime is 64500277. The next prime is 64500283. The reversal of 64500281 is 18200546.

64500281 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 42784681 + 21715600 = 6541^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 64500281 - 2² = 64500277 is a prime.

It is a super-2 number, since 2×64500281² = 8320572498157922, 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 64500281.

It is not an unprimeable number, because it can be changed into a prime (64500283) 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, 116150 + ... + 116703.

It is an arithmetic number, because the mean of its divisors is an integer number (16183353).

Almost surely, 2^64500281 is an apocalyptic number.

It is an amenable number.

64500281 is a deficient number, since it is larger than the sum of its proper divisors (233131).

64500281 is a wasteful number, since it uses less digits than its factorization.

64500281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233130.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 64500281 is about 8031.2066963813. The cubic root of 64500281 is about 401.0395480923.

The spelling of 64500281 in words is "sixty-four million, five hundred thousand, two hundred eighty-one".