1015052221 has 4 divisors (see below), whose sum is σ = 1017475200. Its totient is φ = 1012629244.

The previous prime is 1015052197. The next prime is 1015052243. The reversal of 1015052221 is 1222505101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1015052221 is a prime.

It is a super-2 number, since 2×1015052221² = 2060662022714065682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015052021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210861 + ... + 1211698.

It is an arithmetic number, because the mean of its divisors is an integer number (254368800).

Almost surely, 2^1015052221 is an apocalyptic number.

It is an amenable number.

1015052221 is a deficient number, since it is larger than the sum of its proper divisors (2422979).

1015052221 is an equidigital number, since it uses as much as digits as its factorization.

1015052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422978.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1015052221 is about 31859.8841962742. The cubic root of 1015052221 is about 1004.9924410543.

Adding to 1015052221 its reverse (1222505101), we get a palindrome (2237557322).

The spelling of 1015052221 in words is "one billion, fifteen million, fifty-two thousand, two hundred twenty-one".