63440217 has 6 divisors (see below), whose sum is σ = 91635882. Its totient is φ = 42293472.

The previous prime is 63440207. The next prime is 63440219. The reversal of 63440217 is 71204436.

63440217 is a `hidden beast` number, since 6 + 3 + 440 + 217 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 16941456 = 6819^2 + 4116^2 .

It is not a de Polignac number, because 63440217 - 2¹⁶ = 63374681 is a prime.

It is a super-2 number, since 2×63440217² = 8049322266014178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63440219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3524448 + ... + 3524465.

It is an arithmetic number, because the mean of its divisors is an integer number (15272647).

Almost surely, 2^63440217 is an apocalyptic number.

It is an amenable number.

63440217 is a deficient number, since it is larger than the sum of its proper divisors (28195665).

63440217 is a wasteful number, since it uses less digits than its factorization.

63440217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048919 (or 7048916 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 63440217 is about 7964.9367229125. The cubic root of 63440217 is about 398.8303686565.

The spelling of 63440217 in words is "sixty-three million, four hundred forty thousand, two hundred seventeen".