11512217025 has 81 divisors (see below), whose sum is σ = 21624677347. Its totient is φ = 5854015200.

The previous prime is 11512216993. The next prime is 11512217033. The reversal of 11512217025 is 52071221511.

The square root of 11512217025 is 107295.

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., 4144398129 + 7367818896 = 64377^2 + 85836^2 .

It is not a de Polignac number, because 11512217025 - 2⁵ = 11512216993 is a prime.

It is a super-2 number, since 2×11512217025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11512217025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 37016620 + ... + 37016930.

Almost surely, 2^11512217025 is an apocalyptic number.

11512217025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11512217025 is the 107295-th square number.

11512217025 is the 53648-th centered octagonal number.

It is an amenable number.

11512217025 is a deficient number, since it is larger than the sum of its proper divisors (10112460322).

11512217025 is an equidigital number, since it uses as much as digits as its factorization.

11512217025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

Adding to 11512217025 its reverse (52071221511), we get a palindrome (63583438536).

The spelling of 11512217025 in words is "eleven billion, five hundred twelve million, two hundred seventeen thousand, twenty-five".