260221536 has 36 divisors (see below), whose sum is σ = 740005812. Its totient is φ = 86740416.

The previous prime is 260221529. The next prime is 260221537. The reversal of 260221536 is 635122062.

260221536 is a `hidden beast` number, since 2 + 602 + 2 + 1 + 53 + 6 = 666.

260221536 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260221537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 451486 + ... + 452061.

It is an arithmetic number, because the mean of its divisors is an integer number (20555717).

Almost surely, 2^260221536 is an apocalyptic number.

It is an amenable number.

260221536 is an abundant number, since it is smaller than the sum of its proper divisors (479784276).

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

260221536 is a wasteful number, since it uses less digits than its factorization.

260221536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903563 (or 903552 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 260221536 is about 16131.3835736430. The cubic root of 260221536 is about 638.4316546386.

Adding to 260221536 its reverse (635122062), we get a palindrome (895343598).

The spelling of 260221536 in words is "two hundred sixty million, two hundred twenty-one thousand, five hundred thirty-six".