260015221 has 8 divisors (see below), whose sum is σ = 276851520. Its totient is φ = 243350208.

The previous prime is 260015143. The next prime is 260015237. The reversal of 260015221 is 122510062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 260015221 - 2²¹ = 257918069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260015291) 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, 39681 + ... + 45766.

It is an arithmetic number, because the mean of its divisors is an integer number (34606440).

Almost surely, 2^260015221 is an apocalyptic number.

It is an amenable number.

260015221 is a deficient number, since it is larger than the sum of its proper divisors (16836299).

260015221 is a wasteful number, since it uses less digits than its factorization.

260015221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85643.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 260015221 is about 16124.9874728634. The cubic root of 260015221 is about 638.2628845273.

Adding to 260015221 its reverse (122510062), we get a palindrome (382525283).

The spelling of 260015221 in words is "two hundred sixty million, fifteen thousand, two hundred twenty-one".