64135210 has 16 divisors (see below), whose sum is σ = 115535016. Its totient is φ = 25633728.

The previous prime is 64135207. The next prime is 64135219. The reversal of 64135210 is 1253146.

It can be written as a sum of positive squares in 4 ways, for example, as 52142841 + 11992369 = 7221^2 + 3463^2 .

It is a super-2 number, since 2×64135210² = 8226650323488200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64135219) 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 7 ways as a sum of consecutive naturals, for example, 21532 + ... + 24328.

Almost surely, 2^64135210 is an apocalyptic number.

64135210 is a deficient number, since it is larger than the sum of its proper divisors (51399806).

64135210 is a wasteful number, since it uses less digits than its factorization.

64135210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 64135210 is about 8008.4461663921. The cubic root of 64135210 is about 400.2814893629.

Adding to 64135210 its reverse (1253146), we get a palindrome (65388356).

The spelling of 64135210 in words is "sixty-four million, one hundred thirty-five thousand, two hundred ten".