260221500 has 288 divisors, whose sum is σ = 1024837632. Its totient is φ = 54000000.

The previous prime is 260221441. The next prime is 260221519. The reversal of 260221500 is 5122062.

260221500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 346125 + ... + 346875.

It is an arithmetic number, because the mean of its divisors is an integer number (3558464).

Almost surely, 2^260221500 is an apocalyptic number.

260221500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260221500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512418816).

260221500 is an abundant number, since it is smaller than the sum of its proper divisors (764616132).

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

260221500 is a wasteful number, since it uses less digits than its factorization.

260221500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 260221500 is about 16131.3824578057. The cubic root of 260221500 is about 638.4316251976.

Adding to 260221500 its reverse (5122062), we get a palindrome (265343562).

The spelling of 260221500 in words is "two hundred sixty million, two hundred twenty-one thousand, five hundred".