64255220 has 24 divisors (see below), whose sum is σ = 135550464. Its totient is φ = 25585056.

The previous prime is 64255187. The next prime is 64255229. The reversal of 64255220 is 2255246.

It is a self number, because there is not a number n which added to its sum of digits gives 64255220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64255229) 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, 2744 + ... + 11663.

It is an arithmetic number, because the mean of its divisors is an integer number (5647936).

Almost surely, 2^64255220 is an apocalyptic number.

It is an amenable number.

64255220 is an abundant number, since it is smaller than the sum of its proper divisors (71295244).

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

64255220 is a wasteful number, since it uses less digits than its factorization.

64255220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14639 (or 14637 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 64255220 is about 8015.9353789810. The cubic root of 64255220 is about 400.5310031106.

Adding to 64255220 its sum of digits (26), we get a palindrome (64255246).

The spelling of 64255220 in words is "sixty-four million, two hundred fifty-five thousand, two hundred twenty".