11115543225 has 24 divisors (see below), whose sum is σ = 18518002272. Its totient is φ = 5883030400.

The previous prime is 11115543209. The next prime is 11115543239. The reversal of 11115543225 is 52234551111.

It is not a de Polignac number, because 11115543225 - 2⁴ = 11115543209 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 11115543192 and 11115543201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555852 + ... + 575501.

It is an arithmetic number, because the mean of its divisors is an integer number (771583428).

Almost surely, 2^11115543225 is an apocalyptic number.

11115543225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11115543225 is a deficient number, since it is larger than the sum of its proper divisors (7402459047).

11115543225 is a wasteful number, since it uses less digits than its factorization.

11115543225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131497 (or 1131492 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The spelling of 11115543225 in words is "eleven billion, one hundred fifteen million, five hundred forty-three thousand, two hundred twenty-five".