640313230 has 16 divisors (see below), whose sum is σ = 1160858160. Its totient is φ = 254282112.

The previous prime is 640313221. The next prime is 640313239. The reversal of 640313230 is 32313046.

640313230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (640313221) and next prime (640313239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640313239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228939 + ... + 231718.

It is an arithmetic number, because the mean of its divisors is an integer number (72553635).

Almost surely, 2^640313230 is an apocalyptic number.

640313230 is a deficient number, since it is larger than the sum of its proper divisors (520544930).

640313230 is a wasteful number, since it uses less digits than its factorization.

640313230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460803.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 640313230 is about 25304.4112755069. The cubic root of 640313230 is about 861.9144434117.

Adding to 640313230 its reverse (32313046), we get a palindrome (672626276).

The spelling of 640313230 in words is "six hundred forty million, three hundred thirteen thousand, two hundred thirty".