11215869025 has 27 divisors (see below), whose sum is σ = 14186913811. Its totient is φ = 8796045680.

The previous prime is 11215869001. The next prime is 11215869047. The reversal of 11215869025 is 52096851211.

The square root of 11215869025 is 105905.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4037712849 + 7178156176 = 63543^2 + 84724^2 .

It is not a de Polignac number, because 11215869025 - 2⁷ = 11215868897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31241796 + ... + 31242154.

Almost surely, 2^11215869025 is an apocalyptic number.

11215869025 is the 105905-th square number.

11215869025 is the 52953-rd centered octagonal number.

It is an amenable number.

11215869025 is a deficient number, since it is larger than the sum of its proper divisors (2971044786).

11215869025 is an frugal number, since it uses more digits than its factorization.

11215869025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 11215869025 in words is "eleven billion, two hundred fifteen million, eight hundred sixty-nine thousand, twenty-five".