11115311225 has 12 divisors (see below), whose sum is σ = 13784626284. Its totient is φ = 8891190720.

The previous prime is 11115311219. The next prime is 11115311243. The reversal of 11115311225 is 52211351111.

It can be written as a sum of positive squares in 6 ways, for example, as 1543232656 + 9572078569 = 39284^2 + 97837^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11115311225 is a prime.

It is a super-2 number, since 2×11115311225² (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 11115311225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240707 + ... + 283143.

It is an arithmetic number, because the mean of its divisors is an integer number (1148718857).

Almost surely, 2^11115311225 is an apocalyptic number.

It is an amenable number.

11115311225 is a deficient number, since it is larger than the sum of its proper divisors (2669315059).

11115311225 is a wasteful number, since it uses less digits than its factorization.

11115311225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52924 (or 52919 counting only the distinct ones).

The product of its digits is 300, while the sum is 23.

Adding to 11115311225 its reverse (52211351111), we get a palindrome (63326662336).

The spelling of 11115311225 in words is "eleven billion, one hundred fifteen million, three hundred eleven thousand, two hundred twenty-five".