64211247 has 6 divisors (see below), whose sum is σ = 92749592. Its totient is φ = 42807492.

The previous prime is 64211219. The next prime is 64211267. The reversal of 64211247 is 74211246.

64211247 is a `hidden beast` number, since 642 + 1 + 12 + 4 + 7 = 666.

It is not a de Polignac number, because 64211247 - 2⁶ = 64211183 is a prime.

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 64211247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64211267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3567283 + ... + 3567300.

Almost surely, 2^64211247 is an apocalyptic number.

64211247 is a deficient number, since it is larger than the sum of its proper divisors (28538345).

64211247 is a wasteful number, since it uses less digits than its factorization.

64211247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134589 (or 7134586 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 64211247 is about 8013.1920605961. The cubic root of 64211247 is about 400.4396145872.

Subtracting 64211247 from its reverse (74211246), we obtain a palindrome (9999999).

The spelling of 64211247 in words is "sixty-four million, two hundred eleven thousand, two hundred forty-seven".