64247205 has 32 divisors (see below), whose sum is σ = 114887808. Its totient is φ = 30387200.

The previous prime is 64247201. The next prime is 64247273. The reversal of 64247205 is 50274246.

It is not a de Polignac number, because 64247205 - 2² = 64247201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64247201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2017 + ... + 11513.

It is an arithmetic number, because the mean of its divisors is an integer number (3590244).

Almost surely, 2^64247205 is an apocalyptic number.

It is an amenable number.

64247205 is a deficient number, since it is larger than the sum of its proper divisors (50640603).

64247205 is a wasteful number, since it uses less digits than its factorization.

64247205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9557.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 64247205 is about 8015.4354217347. The cubic root of 64247205 is about 400.5143487466.

The spelling of 64247205 in words is "sixty-four million, two hundred forty-seven thousand, two hundred five".