1000515221 has 8 divisors (see below), whose sum is σ = 1024442304. Its totient is φ = 976852800.

The previous prime is 1000515209. The next prime is 1000515227. The reversal of 1000515221 is 1225150001.

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 1000515221 - 2¹⁰ = 1000514197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000515221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000515227) 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, 58505 + ... + 73646.

It is an arithmetic number, because the mean of its divisors is an integer number (128055288).

Almost surely, 2^1000515221 is an apocalyptic number.

It is an amenable number.

1000515221 is a deficient number, since it is larger than the sum of its proper divisors (23927083).

1000515221 is a wasteful number, since it uses less digits than its factorization.

1000515221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132331.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1000515221 is about 31630.9219119519. The cubic root of 1000515221 is about 1000.1717108470.

Adding to 1000515221 its reverse (1225150001), we get a palindrome (2225665222).

The spelling of 1000515221 in words is "one billion, five hundred fifteen thousand, two hundred twenty-one".