11521433025 has 36 divisors (see below), whose sum is σ = 20644337532. Its totient is φ = 6142331520.

The previous prime is 11521432981. The next prime is 11521433059. The reversal of 11521433025 is 52033412511.

11521433025 is a `hidden beast` number, since 115 + 214 + 330 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 159365376 + 11362067649 = 12624^2 + 106593^2 .

It is not a de Polignac number, because 11521433025 - 2⁶ = 11521432961 is a prime.

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 11521433025.

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 35 ways as a sum of consecutive naturals, for example, 656667 + ... + 673983.

Almost surely, 2^11521433025 is an apocalyptic number.

11521433025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11521433025 is a deficient number, since it is larger than the sum of its proper divisors (9122904507).

11521433025 is a wasteful number, since it uses less digits than its factorization.

11521433025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20290 (or 20282 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 11521433025 its reverse (52033412511), we get a palindrome (63554845536).

The spelling of 11521433025 in words is "eleven billion, five hundred twenty-one million, four hundred thirty-three thousand, twenty-five".