64216250 has 80 divisors (see below), whose sum is σ = 141704640. Its totient is φ = 21360000.

The previous prime is 64216247. The next prime is 64216261. The reversal of 64216250 is 5261246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 358661 + ... + 358839.

It is an arithmetic number, because the mean of its divisors is an integer number (1771308).

Almost surely, 2^64216250 is an apocalyptic number.

64216250 is an abundant number, since it is smaller than the sum of its proper divisors (77488390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64216250 is a wasteful number, since it uses less digits than its factorization.

64216250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 64216250 is about 8013.5042272404. The cubic root of 64216250 is about 400.4500143612.

Adding to 64216250 its reverse (5261246), we get a palindrome (69477496).

The spelling of 64216250 in words is "sixty-four million, two hundred sixteen thousand, two hundred fifty".